IntellisenseTextBox.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Rules / Design / Dialogs / IntellisenseTextBox.cs / 1305376 / IntellisenseTextBox.cs

                            // ---------------------------------------------------------------------------- 
// Copyright (C) 2006 Microsoft Corporation All Rights Reserved
// ---------------------------------------------------------------------------

#define CODE_ANALYSIS 
using System.Collections;
using System.Diagnostics.CodeAnalysis; 
using System.Drawing; 
using System.Globalization;
using System.Reflection; 
using System.Text;
using System.Windows.Forms;

namespace System.Workflow.Activities.Rules.Design 
{
    #region IntellisenseTextBox 
 
    internal partial class IntellisenseTextBox : TextBox
    { 
        #region members and constructors

        private ListView listBoxAutoComplete = new ListView();
        public event EventHandler PopulateAutoCompleteList; 
        public event EventHandler PopulateToolTipList;
        int oldSelectionStart; 
 
        enum memberIcons
        { 
            Default = 0,
            Type = 1,
            PublicMethod = 2,
            PrivateMethod = 3, 
            InternalMethod = 4,
            ProtectedMethod = 5, 
            PublicProperty = 6, 
            PrivateProperty = 7,
            InternalProperty = 8, 
            ProtectedProperty = 9,
            PublicField = 10,
            PrivateField = 11,
            InternalField = 12, 
            ProtectedField = 13,
            Keyword = 14, 
            ExtensionMethod = 15 
        }
 
        public IntellisenseTextBox()
        {
            InitializeComponent();
 
            this.AcceptsReturn = true;
 
            this.listBoxAutoComplete.FullRowSelect = true; 
            this.listBoxAutoComplete.MultiSelect = false;
            this.listBoxAutoComplete.SmallImageList = this.autoCompletionImageList; 
            this.listBoxAutoComplete.LargeImageList = this.autoCompletionImageList;
            this.listBoxAutoComplete.View = System.Windows.Forms.View.Details;
            this.listBoxAutoComplete.HeaderStyle = ColumnHeaderStyle.None;
            this.listBoxAutoComplete.Columns.Add(Messages.No, this.listBoxAutoComplete.Size.Width); 
            this.listBoxAutoComplete.CausesValidation = false;
            this.listBoxAutoComplete.Sorting = SortOrder.Ascending; 
 
            this.listBoxAutoComplete.Visible = false;
            this.KeyPress += new KeyPressEventHandler(IntellisenseTextBox_KeyPress); 
            this.HandleCreated += new EventHandler(IntellisenseTextBox_HandleCreated);

        }
 

        #endregion 
 
        #region IntellisenseTextBox event handlers
 
        private void IntellisenseTextBox_HandleCreated(object sender, EventArgs e)
        {
            if (this.TopLevelControl != null)
            { 
                this.TopLevelControl.Controls.Add(this.listBoxAutoComplete);
                this.listBoxAutoComplete.DoubleClick += new EventHandler(listBoxAutoComplete_DoubleClick); 
                this.listBoxAutoComplete.SelectedIndexChanged += new EventHandler(listBoxAutoComplete_SelectedIndexChanged); 
                this.listBoxAutoComplete.Enter += new EventHandler(listBoxAutoComplete_Enter);
            } 
        }

        void IntellisenseTextBox_KeyPress(object sender, KeyPressEventArgs e)
        { 
            string currentValue = this.Text;
            int selectionStart = this.SelectionStart; 
            int selectionLength = this.SelectionLength; 
            StringBuilder projectedValue = new StringBuilder(currentValue.Substring(0, selectionStart));
            projectedValue.Append(currentValue.Substring(selectionStart + selectionLength)); 

            char c = e.KeyChar;
            if (c == '.')
            { 
                if (this.listBoxAutoComplete.Visible)
                { 
                    this.SelectItem(); 
                    HideIntellisenceDropDown();
                    IntellisenseTextBox_KeyPress(sender, e); 
                }
                else
                {
                    projectedValue.Insert(selectionStart, '.'); 
                    UpdateIntellisenceDropDown(projectedValue.ToString().Substring(0, selectionStart + 1));
                    ShowIntellisenceDropDown(selectionStart); 
                    IntellisenseTextBox_KeyDown(sender, new KeyEventArgs(Keys.Down)); // fake down arrow to select first item 
                }
            } 
            else if (c == '(')
            {
                if (listBoxAutoComplete.Visible)
                { 
                    this.SelectItem();
                    HideIntellisenceDropDown(); 
                    IntellisenseTextBox_KeyPress(sender, e); 
                }
                else 
                {
                    projectedValue.Insert(selectionStart, '(');
                    ShowToolTip(selectionStart, projectedValue.ToString().Substring(0, selectionStart + 1));
                } 
            }
            else if (!this.listBoxAutoComplete.Visible 
                && CurrentPrefix.Length == 0 
                && (c == '_' || char.IsLetter(c) || char.GetUnicodeCategory(c) == UnicodeCategory.LetterNumber))
            { 
                projectedValue.Insert(selectionStart, c);
                UpdateIntellisenceDropDown(projectedValue.ToString().Substring(0, selectionStart + 1));
                ShowIntellisenceDropDown(selectionStart);
                if (this.listBoxAutoComplete.Visible) 
                    IntellisenseTextBox_KeyDown(sender, new KeyEventArgs(Keys.Down)); // fake down arrow to select first item
            } 
            else if (this.listBoxAutoComplete.Visible) 
            {
                projectedValue.Insert(selectionStart, c); 
                UpdateAutoCompleteSelection(CurrentPrefix + c);
            }
        }
 
 		[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
		private void IntellisenseTextBox_KeyDown(object sender, KeyEventArgs e) 
        { 
            string currentValue = this.Text;
            int selectionStart = this.SelectionStart; 
            int selectionLength = this.SelectionLength;

            StringBuilder removedString = new StringBuilder(currentValue.Substring(selectionStart, selectionLength));
 
            StringBuilder projectedValue = new StringBuilder(currentValue.Substring(0, selectionStart));
            projectedValue.Append(currentValue.Substring(selectionStart + selectionLength)); 
 
            System.Diagnostics.Trace.WriteLine(string.Format(CultureInfo.CurrentCulture, "KeyCode:{0}, KeyData:{1}, KeyValue:{2}", e.KeyCode, e.KeyData, e.KeyValue));
            this.toolTip.Hide(this); 
            if (e.KeyData == (Keys.Control | Keys.Space))
            {
                if (!this.listBoxAutoComplete.Visible)
                { 
                    UpdateIntellisenceDropDown(this.Text.Substring(0, selectionStart - CurrentPrefix.Length));
                    ShowIntellisenceDropDown(selectionStart); 
                    UpdateAutoCompleteSelection(CurrentPrefix); 
                    e.SuppressKeyPress = true;
                    e.Handled = true; 
                }
            }
            else if (e.KeyCode == Keys.Back)
            { 
                if (this.Text.Length > 0)
                { 
                    if (removedString.Length == 0 && selectionStart > 0) 
                    {
                        removedString.Append(projectedValue[selectionStart - 1]); 
                        projectedValue.Length = projectedValue.Length - 1;
                    }

                    if (CurrentPrefix.Length <= 1) 
                        HideIntellisenceDropDown();
 
                    if (removedString.ToString().IndexOfAny(". ()[]\t\n".ToCharArray()) >= 0) 
                        HideIntellisenceDropDown();
                    else if (this.listBoxAutoComplete.Visible) 
                        UpdateAutoCompleteSelection(CurrentPrefix.Substring(0, CurrentPrefix.Length - 1));
                }

            } 
            else if (e.KeyCode == Keys.Up)
            { 
                if (this.listBoxAutoComplete.Visible) 
                {
                    if (this.listBoxAutoComplete.SelectedIndices.Count > 0 && this.listBoxAutoComplete.SelectedIndices[0] > 0) 
                    {
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0] - 1].Selected = true;
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0]].Focused = true;
                    } 

                    e.Handled = true; 
                } 
            }
            else if (e.KeyCode == Keys.Down) 
            {
                if (this.listBoxAutoComplete.Visible)
                {
                    if (this.listBoxAutoComplete.SelectedIndices.Count == 0) 
                    {
                        if (this.listBoxAutoComplete.Items.Count > 0) 
                        { 
                            this.listBoxAutoComplete.Items[0].Selected = true;
                            this.listBoxAutoComplete.Items[0].Focused = true; 
                        }
                    }
                    else if (this.listBoxAutoComplete.SelectedIndices[0] < this.listBoxAutoComplete.Items.Count - 1)
                    { 
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0] + 1].Selected = true;
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0]].Focused = true; 
                    } 
                    e.Handled = true;
                } 
            }
            else if (e.KeyCode == Keys.ShiftKey
                || e.KeyCode == Keys.ControlKey
                || e.KeyCode == Keys.OemPeriod) 
            {
                //DO nothing 
            } 
            else if ((e.KeyValue < 48 || (e.KeyValue >= 58 && e.KeyValue <= 64) || (e.KeyValue >= 91 && e.KeyValue <= 96) || e.KeyValue > 122) &&
                e.KeyData != (Keys.Shift | Keys.OemMinus)) 
            {
                if (this.listBoxAutoComplete.Visible)
                {
                    if (e.KeyCode == Keys.Return || e.KeyCode == Keys.Space) 
                    {
                        this.SelectItem(); 
                        e.Handled = true; 
                    }
 
                    HideIntellisenceDropDown();
                }
            }
        } 

        private void IntellisenseTextBox_Leave(object sender, EventArgs e) 
        { 
            // remmember caret position before leaving
            this.oldSelectionStart = this.SelectionStart; 
            this.toolTip.Hide(this);


            // make sure to close intellisense dropdown 
            if ((this.listBoxAutoComplete.Focused == false) && (this.Focused == false))
                this.listBoxAutoComplete.Visible = false; 
        } 

        private void IntellisenseTextBox_Enter(object sender, EventArgs e) 
        {
            // regain caret position
            if (this.oldSelectionStart >= 0)
                this.SelectionStart = this.oldSelectionStart; 
        }
 
        void IntellisenseTextBox_MouseClick(object sender, MouseEventArgs e) 
        {
            HideIntellisenceDropDown(); 
        }

        #endregion
 
        #region dropdown event handlers
 
        void listBoxAutoComplete_Enter(object sender, EventArgs e) 
        {
            // we want to make sure the dropdown does not contain the focus at all times 
            this.CausesValidation = false;
            this.Focus();
            this.CausesValidation = true;
        } 

        private void listBoxAutoComplete_SelectedIndexChanged(object sender, EventArgs e) 
        { 
            foreach (ListViewItem listViewItem in this.listBoxAutoComplete.Items)
            { 
                // make sure selection looks in focus (note: original
                // selection color for non focused listview is grayed)

                if (listViewItem.Selected) 
                {
                    listViewItem.ForeColor = SystemColors.HighlightText; 
                    listViewItem.BackColor = SystemColors.Highlight; 
                    listViewItem.EnsureVisible();
                } 
                else
                {
                    listViewItem.ForeColor = SystemColors.ControlText;
                    listViewItem.BackColor = SystemColors.Window; 
                }
            } 
        } 

        private void listBoxAutoComplete_DoubleClick(object sender, EventArgs e) 
        {
            // Item double clicked, select it
            if (this.listBoxAutoComplete.SelectedItems.Count == 1)
            { 
                this.SelectItem();
                HideIntellisenceDropDown(); 
            } 
        }
 
        #endregion

        #region helpers
 
        private void SelectItem()
        { 
            if (this.listBoxAutoComplete.SelectedItems.Count > 0) 
            {
                int selectionStart = this.SelectionStart; 
                int prefixEnd = selectionStart - CurrentPrefix.Length;
                int suffixStart = selectionStart;

                if (suffixStart >= this.Text.Length) 
                    suffixStart = this.Text.Length;
 
                string prefix = this.Text.Substring(0, prefixEnd); 
                string fill = this.listBoxAutoComplete.SelectedItems[0].Text;
                string suffix = this.Text.Substring(suffixStart, this.Text.Length - suffixStart); 

                this.Text = prefix + fill + suffix;
                this.SelectionStart = prefix.Length + fill.Length;
                this.ScrollToCaret(); 
                this.oldSelectionStart = this.SelectionStart;
            } 
        } 

		[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")] 
		[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily")]
 		private void PopulateListBox(ICollection list)
        {
            this.listBoxAutoComplete.Items.Clear(); 
            if (list != null && list.Count > 0)
            { 
                foreach (object item in list) 
                {
                    ListViewItem listViewItem = null; 
                    if (item is string)
                    {
                        listViewItem = new ListViewItem(item as string);
                        listViewItem.ImageIndex = (int)memberIcons.Default; 
                    }
                    else if (item is IntellisenseKeyword) 
                    { 
                        listViewItem = new ListViewItem(((IntellisenseKeyword)item).Name);
                        listViewItem.ImageIndex = (int)memberIcons.Keyword; 
                    }
                    else if (item is MemberInfo)
                    {
                        listViewItem = new ListViewItem(((MemberInfo)item).Name as string); 
                        if (item is PropertyInfo)
                        { 
                            MethodInfo mi = ((PropertyInfo)item).GetGetMethod(true); 
                            if (mi == null)
                                mi = ((PropertyInfo)item).GetSetMethod(true); 
                            if (mi.IsPublic)
                                listViewItem.ImageIndex = (int)memberIcons.PublicProperty;
                            else if (mi.IsPrivate)
                                listViewItem.ImageIndex = (int)memberIcons.PrivateProperty; 
                            else if (mi.IsFamily || mi.IsFamilyAndAssembly || mi.IsFamilyOrAssembly)
                                listViewItem.ImageIndex = (int)memberIcons.ProtectedProperty; 
                            else // mi.IsAssembly 
                                listViewItem.ImageIndex = (int)memberIcons.InternalProperty;
                        } 
                        else if (item is FieldInfo)
                        {
                            FieldInfo fi = (FieldInfo)item;
                            if (fi.IsPublic) 
                                listViewItem.ImageIndex = (int)memberIcons.PublicField;
                            else if (fi.IsPrivate) 
                                listViewItem.ImageIndex = (int)memberIcons.PrivateField; 
                            else if (fi.IsFamily || fi.IsFamilyAndAssembly || fi.IsFamilyOrAssembly)
                                listViewItem.ImageIndex = (int)memberIcons.ProtectedField; 
                            else // fi.IsAssembly
                                listViewItem.ImageIndex = (int)memberIcons.InternalField;
                        }
                        else if (item is ExtensionMethodInfo) 
                        {
                            listViewItem.ImageIndex = (int)memberIcons.ExtensionMethod; 
                        } 
                        else if (item is MethodInfo)
                        { 
                            MethodInfo mi = (MethodInfo)item;
                            if (mi.IsPublic)
                                listViewItem.ImageIndex = (int)memberIcons.PublicMethod;
                            else if (mi.IsPrivate) 
                                listViewItem.ImageIndex = (int)memberIcons.PrivateMethod;
                            else if (mi.IsFamily || mi.IsFamilyAndAssembly || mi.IsFamilyOrAssembly) 
                                listViewItem.ImageIndex = (int)memberIcons.ProtectedMethod; 
                            else // mi.IsAssembly
                                listViewItem.ImageIndex = (int)memberIcons.InternalMethod; 
                        }
                        else if (item is Type)
                            listViewItem.ImageIndex = (int)memberIcons.Type;
                    } 
                    this.listBoxAutoComplete.Items.Add(listViewItem);
                } 
            } 
            this.listBoxAutoComplete.Sort();
 
            if (this.listBoxAutoComplete.Items.Count > 0)
            {
                this.listBoxAutoComplete.Columns[0].Width = -2; // this will set the column size to the longest value
                this.listBoxAutoComplete.Size = new Size(this.listBoxAutoComplete.Items[0].Bounds.Width + 30, 72); 
            }
        } 
 
        internal void HideIntellisenceDropDown()
        { 
            this.listBoxAutoComplete.Hide();
            this.toolTip.Hide(this);
        }
 
        private void ShowIntellisenceDropDown(int charIndex)
        { 
            if (this.listBoxAutoComplete.Items.Count > 0) 
            {
                // Find the position of the caret 
                Point clientPoint = this.GetPositionFromCharIndex(charIndex -1);
                clientPoint.Y += (int)Math.Ceiling(this.Font.GetHeight()) + 2;
                clientPoint.X -= 6;
                if (charIndex > 0 && this.Text[charIndex-1] == '\n') 
                {
                    clientPoint.Y += (int)Math.Ceiling(this.Font.GetHeight()); 
                    clientPoint.X = this.GetPositionFromCharIndex(0).X - 6; 
                }
 
                Point parentScreenLocation = TopLevelControl.PointToScreen(new Point(0, 0));
                Point locationInDialog = PointToScreen(clientPoint);
                locationInDialog.Offset(-parentScreenLocation.X, -parentScreenLocation.Y);
 
                //Fix location and size to avoid clipping
                Size topLevelControlSize = (TopLevelControl is Form) ? ((Form)TopLevelControl).ClientSize : TopLevelControl.Size; 
                Rectangle listboxRectangle = new Rectangle(locationInDialog, this.listBoxAutoComplete.Size); 

                if (listboxRectangle.Right > topLevelControlSize.Width) 
                {
                    if (this.listBoxAutoComplete.Size.Width > topLevelControlSize.Width)
                        this.listBoxAutoComplete.Size = new Size(topLevelControlSize.Width, this.listBoxAutoComplete.Height);
 
                    locationInDialog = new Point(topLevelControlSize.Width - this.listBoxAutoComplete.Size.Width, locationInDialog.Y);
                } 
                if (listboxRectangle.Bottom > topLevelControlSize.Height) 
                    this.listBoxAutoComplete.Size = new Size(this.listBoxAutoComplete.Width, topLevelControlSize.Height - listboxRectangle.Top);
 
                // set position and show
                this.listBoxAutoComplete.Location = locationInDialog;
                this.listBoxAutoComplete.BringToFront();
                this.listBoxAutoComplete.Show(); 
            }
        } 
 
        private void UpdateIntellisenceDropDown(string text)
        { 
            AutoCompletionEventArgs autoCompletionEventArgs = new AutoCompletionEventArgs();
            autoCompletionEventArgs.Prefix = text;
            if (this.PopulateAutoCompleteList != null)
                this.PopulateAutoCompleteList(this, autoCompletionEventArgs); 

            PopulateListBox(autoCompletionEventArgs.AutoCompleteValues); 
        } 

        private void UpdateAutoCompleteSelection(string currentValue) 
        {
            bool wordMatched = false;

            if (string.IsNullOrEmpty(currentValue.Trim()) && this.listBoxAutoComplete.Items.Count > 0) 
            {
                wordMatched = true; 
                this.listBoxAutoComplete.Items[0].Selected = true; 
                this.listBoxAutoComplete.Items[0].Focused = true;
            } 
            else
            {
                for (int i = 0; i < this.listBoxAutoComplete.Items.Count; i++)
                { 
                    if (this.listBoxAutoComplete.Items[i].Text.StartsWith(currentValue, StringComparison.OrdinalIgnoreCase))
                    { 
                        wordMatched = true; 
                        this.listBoxAutoComplete.Items[i].Selected = true;
                        this.listBoxAutoComplete.Items[i].Focused = true; 
                        break;
                    }
                }
            } 
            if (!wordMatched && this.listBoxAutoComplete.SelectedItems.Count == 1)
                this.listBoxAutoComplete.SelectedItems[0].Selected = false; 
        } 

        private void ShowToolTip(int charIndex, string prefix) 
        {
            Point clientPoint = this.GetPositionFromCharIndex(charIndex - 1);
            clientPoint.Y += (int)Math.Ceiling(this.Font.GetHeight()) + 2;
            clientPoint.X -= 6; 

            AutoCompletionEventArgs autoCompletionEventArgs = new AutoCompletionEventArgs(); 
            autoCompletionEventArgs.Prefix = prefix; 

            if (this.PopulateToolTipList != null) 
            {
                this.PopulateToolTipList(this, autoCompletionEventArgs);

                if (autoCompletionEventArgs.AutoCompleteValues != null) 
                {
                    StringBuilder toolTipText = new StringBuilder(); 
                    bool firstMethod = true; 
                    foreach (MemberInfo memberInfo in autoCompletionEventArgs.AutoCompleteValues)
                    { 
                        if (firstMethod)
                            firstMethod = false;
                        else
                            toolTipText.Append("\n"); 

                        ParameterInfo[] parameters = null; 
 
                        MethodInfo methodInfo = memberInfo as MethodInfo;
                        if (methodInfo != null) 
                        {
                            toolTipText.Append(RuleDecompiler.DecompileType(methodInfo.ReturnType));
                            toolTipText.Append(" ");
                            toolTipText.Append(methodInfo.Name); 
                            toolTipText.Append("(");
 
                            parameters = methodInfo.GetParameters(); 
                        }
                        else 
                        {
                            // Must be constructor... if not, the best thing to do is let it throw "invalid cast".
                            ConstructorInfo ctorInfo = (ConstructorInfo)memberInfo;
 
                            toolTipText.Append(RuleDecompiler.DecompileType(ctorInfo.DeclaringType));
                            toolTipText.Append("("); 
 
                            parameters = ctorInfo.GetParameters();
                        } 


                        if (parameters != null && parameters.Length > 0)
                        { 
                            int lastParamIndex = parameters.Length - 1;
 
                            // Append the first parameter 
                            AppendParameterInfo(toolTipText, parameters[0], 0 == lastParamIndex);
                            for (int i = 1; i < parameters.Length; ++i) 
                            {
                                toolTipText.Append(", ");
                                AppendParameterInfo(toolTipText, parameters[i], i == lastParamIndex);
                            } 
                        }
 
                        toolTipText.Append(")"); 
                    }
                    this.toolTip.Show(toolTipText.ToString(), this, clientPoint); 
                }
            }
        }
 
        private static void AppendParameterInfo(StringBuilder toolTipText, ParameterInfo parameterInfo, bool isLastParameter)
        { 
            Type paramType = parameterInfo.ParameterType; 
            if (paramType != null)
            { 
                if (paramType.IsByRef)
                {
                    if (parameterInfo.IsOut)
                        toolTipText.Append("out "); 
                    else
                        toolTipText.Append("ref "); 
 
                    paramType = paramType.GetElementType();
                } 
                else if (isLastParameter && paramType.IsArray)
                {
                    object[] attrs = parameterInfo.GetCustomAttributes(typeof(ParamArrayAttribute), false);
                    if (attrs != null && attrs.Length > 0) 
                        toolTipText.Append("params ");
                } 
 
                toolTipText.Append(RuleDecompiler.DecompileType(paramType));
                toolTipText.Append(" "); 
            }
            toolTipText.Append(parameterInfo.Name);
        }
 
        private string CurrentPrefix
        { 
            get 
            {
                string textTillCaret = this.Text.Substring(0, this.SelectionStart); 

                int prefixStart = textTillCaret.LastIndexOfAny(" .()[]\t\r\n".ToCharArray());
                if (prefixStart >= 0)
                    return textTillCaret.Substring(prefixStart + 1); 
                else
                    return textTillCaret; 
            } 
        }
 
        #endregion

        #region override members
 
        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        { 
            // bail out an editcontrol before giving up on the dialog 
            if (this.listBoxAutoComplete.Visible)
            { 
                switch (keyData)
                {
                    case Keys.Enter:
                    case Keys.Tab: 
                        this.SelectItem();
                        HideIntellisenceDropDown(); 
                        return true; 
                    case Keys.Escape:
                        HideIntellisenceDropDown(); 
                        return true;
                    default:
                        break;
                } 
            }
            return base.ProcessCmdKey(ref msg, keyData); 
        } 

        #endregion 
    }

    #endregion
 
    #region AutoCompletionEventArgs
 
    internal class AutoCompletionEventArgs : EventArgs 
    {
        private string prefix; 
        ICollection autoCompleteValues;

        public ICollection AutoCompleteValues
        { 
            get
            { 
                return autoCompleteValues; 
            }
            set 
            {
                autoCompleteValues = value;
            }
        } 

        public string Prefix 
        { 
            get
            { 
                return prefix;
            }
            set
            { 
                prefix = value;
            } 
        } 
    }
 
    #endregion
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
// ---------------------------------------------------------------------------- 
// Copyright (C) 2006 Microsoft Corporation All Rights Reserved
// ---------------------------------------------------------------------------

#define CODE_ANALYSIS 
using System.Collections;
using System.Diagnostics.CodeAnalysis; 
using System.Drawing; 
using System.Globalization;
using System.Reflection; 
using System.Text;
using System.Windows.Forms;

namespace System.Workflow.Activities.Rules.Design 
{
    #region IntellisenseTextBox 
 
    internal partial class IntellisenseTextBox : TextBox
    { 
        #region members and constructors

        private ListView listBoxAutoComplete = new ListView();
        public event EventHandler PopulateAutoCompleteList; 
        public event EventHandler PopulateToolTipList;
        int oldSelectionStart; 
 
        enum memberIcons
        { 
            Default = 0,
            Type = 1,
            PublicMethod = 2,
            PrivateMethod = 3, 
            InternalMethod = 4,
            ProtectedMethod = 5, 
            PublicProperty = 6, 
            PrivateProperty = 7,
            InternalProperty = 8, 
            ProtectedProperty = 9,
            PublicField = 10,
            PrivateField = 11,
            InternalField = 12, 
            ProtectedField = 13,
            Keyword = 14, 
            ExtensionMethod = 15 
        }
 
        public IntellisenseTextBox()
        {
            InitializeComponent();
 
            this.AcceptsReturn = true;
 
            this.listBoxAutoComplete.FullRowSelect = true; 
            this.listBoxAutoComplete.MultiSelect = false;
            this.listBoxAutoComplete.SmallImageList = this.autoCompletionImageList; 
            this.listBoxAutoComplete.LargeImageList = this.autoCompletionImageList;
            this.listBoxAutoComplete.View = System.Windows.Forms.View.Details;
            this.listBoxAutoComplete.HeaderStyle = ColumnHeaderStyle.None;
            this.listBoxAutoComplete.Columns.Add(Messages.No, this.listBoxAutoComplete.Size.Width); 
            this.listBoxAutoComplete.CausesValidation = false;
            this.listBoxAutoComplete.Sorting = SortOrder.Ascending; 
 
            this.listBoxAutoComplete.Visible = false;
            this.KeyPress += new KeyPressEventHandler(IntellisenseTextBox_KeyPress); 
            this.HandleCreated += new EventHandler(IntellisenseTextBox_HandleCreated);

        }
 

        #endregion 
 
        #region IntellisenseTextBox event handlers
 
        private void IntellisenseTextBox_HandleCreated(object sender, EventArgs e)
        {
            if (this.TopLevelControl != null)
            { 
                this.TopLevelControl.Controls.Add(this.listBoxAutoComplete);
                this.listBoxAutoComplete.DoubleClick += new EventHandler(listBoxAutoComplete_DoubleClick); 
                this.listBoxAutoComplete.SelectedIndexChanged += new EventHandler(listBoxAutoComplete_SelectedIndexChanged); 
                this.listBoxAutoComplete.Enter += new EventHandler(listBoxAutoComplete_Enter);
            } 
        }

        void IntellisenseTextBox_KeyPress(object sender, KeyPressEventArgs e)
        { 
            string currentValue = this.Text;
            int selectionStart = this.SelectionStart; 
            int selectionLength = this.SelectionLength; 
            StringBuilder projectedValue = new StringBuilder(currentValue.Substring(0, selectionStart));
            projectedValue.Append(currentValue.Substring(selectionStart + selectionLength)); 

            char c = e.KeyChar;
            if (c == '.')
            { 
                if (this.listBoxAutoComplete.Visible)
                { 
                    this.SelectItem(); 
                    HideIntellisenceDropDown();
                    IntellisenseTextBox_KeyPress(sender, e); 
                }
                else
                {
                    projectedValue.Insert(selectionStart, '.'); 
                    UpdateIntellisenceDropDown(projectedValue.ToString().Substring(0, selectionStart + 1));
                    ShowIntellisenceDropDown(selectionStart); 
                    IntellisenseTextBox_KeyDown(sender, new KeyEventArgs(Keys.Down)); // fake down arrow to select first item 
                }
            } 
            else if (c == '(')
            {
                if (listBoxAutoComplete.Visible)
                { 
                    this.SelectItem();
                    HideIntellisenceDropDown(); 
                    IntellisenseTextBox_KeyPress(sender, e); 
                }
                else 
                {
                    projectedValue.Insert(selectionStart, '(');
                    ShowToolTip(selectionStart, projectedValue.ToString().Substring(0, selectionStart + 1));
                } 
            }
            else if (!this.listBoxAutoComplete.Visible 
                && CurrentPrefix.Length == 0 
                && (c == '_' || char.IsLetter(c) || char.GetUnicodeCategory(c) == UnicodeCategory.LetterNumber))
            { 
                projectedValue.Insert(selectionStart, c);
                UpdateIntellisenceDropDown(projectedValue.ToString().Substring(0, selectionStart + 1));
                ShowIntellisenceDropDown(selectionStart);
                if (this.listBoxAutoComplete.Visible) 
                    IntellisenseTextBox_KeyDown(sender, new KeyEventArgs(Keys.Down)); // fake down arrow to select first item
            } 
            else if (this.listBoxAutoComplete.Visible) 
            {
                projectedValue.Insert(selectionStart, c); 
                UpdateAutoCompleteSelection(CurrentPrefix + c);
            }
        }
 
 		[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
		private void IntellisenseTextBox_KeyDown(object sender, KeyEventArgs e) 
        { 
            string currentValue = this.Text;
            int selectionStart = this.SelectionStart; 
            int selectionLength = this.SelectionLength;

            StringBuilder removedString = new StringBuilder(currentValue.Substring(selectionStart, selectionLength));
 
            StringBuilder projectedValue = new StringBuilder(currentValue.Substring(0, selectionStart));
            projectedValue.Append(currentValue.Substring(selectionStart + selectionLength)); 
 
            System.Diagnostics.Trace.WriteLine(string.Format(CultureInfo.CurrentCulture, "KeyCode:{0}, KeyData:{1}, KeyValue:{2}", e.KeyCode, e.KeyData, e.KeyValue));
            this.toolTip.Hide(this); 
            if (e.KeyData == (Keys.Control | Keys.Space))
            {
                if (!this.listBoxAutoComplete.Visible)
                { 
                    UpdateIntellisenceDropDown(this.Text.Substring(0, selectionStart - CurrentPrefix.Length));
                    ShowIntellisenceDropDown(selectionStart); 
                    UpdateAutoCompleteSelection(CurrentPrefix); 
                    e.SuppressKeyPress = true;
                    e.Handled = true; 
                }
            }
            else if (e.KeyCode == Keys.Back)
            { 
                if (this.Text.Length > 0)
                { 
                    if (removedString.Length == 0 && selectionStart > 0) 
                    {
                        removedString.Append(projectedValue[selectionStart - 1]); 
                        projectedValue.Length = projectedValue.Length - 1;
                    }

                    if (CurrentPrefix.Length <= 1) 
                        HideIntellisenceDropDown();
 
                    if (removedString.ToString().IndexOfAny(". ()[]\t\n".ToCharArray()) >= 0) 
                        HideIntellisenceDropDown();
                    else if (this.listBoxAutoComplete.Visible) 
                        UpdateAutoCompleteSelection(CurrentPrefix.Substring(0, CurrentPrefix.Length - 1));
                }

            } 
            else if (e.KeyCode == Keys.Up)
            { 
                if (this.listBoxAutoComplete.Visible) 
                {
                    if (this.listBoxAutoComplete.SelectedIndices.Count > 0 && this.listBoxAutoComplete.SelectedIndices[0] > 0) 
                    {
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0] - 1].Selected = true;
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0]].Focused = true;
                    } 

                    e.Handled = true; 
                } 
            }
            else if (e.KeyCode == Keys.Down) 
            {
                if (this.listBoxAutoComplete.Visible)
                {
                    if (this.listBoxAutoComplete.SelectedIndices.Count == 0) 
                    {
                        if (this.listBoxAutoComplete.Items.Count > 0) 
                        { 
                            this.listBoxAutoComplete.Items[0].Selected = true;
                            this.listBoxAutoComplete.Items[0].Focused = true; 
                        }
                    }
                    else if (this.listBoxAutoComplete.SelectedIndices[0] < this.listBoxAutoComplete.Items.Count - 1)
                    { 
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0] + 1].Selected = true;
                        this.listBoxAutoComplete.Items[this.listBoxAutoComplete.SelectedIndices[0]].Focused = true; 
                    } 
                    e.Handled = true;
                } 
            }
            else if (e.KeyCode == Keys.ShiftKey
                || e.KeyCode == Keys.ControlKey
                || e.KeyCode == Keys.OemPeriod) 
            {
                //DO nothing 
            } 
            else if ((e.KeyValue < 48 || (e.KeyValue >= 58 && e.KeyValue <= 64) || (e.KeyValue >= 91 && e.KeyValue <= 96) || e.KeyValue > 122) &&
                e.KeyData != (Keys.Shift | Keys.OemMinus)) 
            {
                if (this.listBoxAutoComplete.Visible)
                {
                    if (e.KeyCode == Keys.Return || e.KeyCode == Keys.Space) 
                    {
                        this.SelectItem(); 
                        e.Handled = true; 
                    }
 
                    HideIntellisenceDropDown();
                }
            }
        } 

        private void IntellisenseTextBox_Leave(object sender, EventArgs e) 
        { 
            // remmember caret position before leaving
            this.oldSelectionStart = this.SelectionStart; 
            this.toolTip.Hide(this);


            // make sure to close intellisense dropdown 
            if ((this.listBoxAutoComplete.Focused == false) && (this.Focused == false))
                this.listBoxAutoComplete.Visible = false; 
        } 

        private void IntellisenseTextBox_Enter(object sender, EventArgs e) 
        {
            // regain caret position
            if (this.oldSelectionStart >= 0)
                this.SelectionStart = this.oldSelectionStart; 
        }
 
        void IntellisenseTextBox_MouseClick(object sender, MouseEventArgs e) 
        {
            HideIntellisenceDropDown(); 
        }

        #endregion
 
        #region dropdown event handlers
 
        void listBoxAutoComplete_Enter(object sender, EventArgs e) 
        {
            // we want to make sure the dropdown does not contain the focus at all times 
            this.CausesValidation = false;
            this.Focus();
            this.CausesValidation = true;
        } 

        private void listBoxAutoComplete_SelectedIndexChanged(object sender, EventArgs e) 
        { 
            foreach (ListViewItem listViewItem in this.listBoxAutoComplete.Items)
            { 
                // make sure selection looks in focus (note: original
                // selection color for non focused listview is grayed)

                if (listViewItem.Selected) 
                {
                    listViewItem.ForeColor = SystemColors.HighlightText; 
                    listViewItem.BackColor = SystemColors.Highlight; 
                    listViewItem.EnsureVisible();
                } 
                else
                {
                    listViewItem.ForeColor = SystemColors.ControlText;
                    listViewItem.BackColor = SystemColors.Window; 
                }
            } 
        } 

        private void listBoxAutoComplete_DoubleClick(object sender, EventArgs e) 
        {
            // Item double clicked, select it
            if (this.listBoxAutoComplete.SelectedItems.Count == 1)
            { 
                this.SelectItem();
                HideIntellisenceDropDown(); 
            } 
        }
 
        #endregion

        #region helpers
 
        private void SelectItem()
        { 
            if (this.listBoxAutoComplete.SelectedItems.Count > 0) 
            {
                int selectionStart = this.SelectionStart; 
                int prefixEnd = selectionStart - CurrentPrefix.Length;
                int suffixStart = selectionStart;

                if (suffixStart >= this.Text.Length) 
                    suffixStart = this.Text.Length;
 
                string prefix = this.Text.Substring(0, prefixEnd); 
                string fill = this.listBoxAutoComplete.SelectedItems[0].Text;
                string suffix = this.Text.Substring(suffixStart, this.Text.Length - suffixStart); 

                this.Text = prefix + fill + suffix;
                this.SelectionStart = prefix.Length + fill.Length;
                this.ScrollToCaret(); 
                this.oldSelectionStart = this.SelectionStart;
            } 
        } 

		[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")] 
		[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily")]
 		private void PopulateListBox(ICollection list)
        {
            this.listBoxAutoComplete.Items.Clear(); 
            if (list != null && list.Count > 0)
            { 
                foreach (object item in list) 
                {
                    ListViewItem listViewItem = null; 
                    if (item is string)
                    {
                        listViewItem = new ListViewItem(item as string);
                        listViewItem.ImageIndex = (int)memberIcons.Default; 
                    }
                    else if (item is IntellisenseKeyword) 
                    { 
                        listViewItem = new ListViewItem(((IntellisenseKeyword)item).Name);
                        listViewItem.ImageIndex = (int)memberIcons.Keyword; 
                    }
                    else if (item is MemberInfo)
                    {
                        listViewItem = new ListViewItem(((MemberInfo)item).Name as string); 
                        if (item is PropertyInfo)
                        { 
                            MethodInfo mi = ((PropertyInfo)item).GetGetMethod(true); 
                            if (mi == null)
                                mi = ((PropertyInfo)item).GetSetMethod(true); 
                            if (mi.IsPublic)
                                listViewItem.ImageIndex = (int)memberIcons.PublicProperty;
                            else if (mi.IsPrivate)
                                listViewItem.ImageIndex = (int)memberIcons.PrivateProperty; 
                            else if (mi.IsFamily || mi.IsFamilyAndAssembly || mi.IsFamilyOrAssembly)
                                listViewItem.ImageIndex = (int)memberIcons.ProtectedProperty; 
                            else // mi.IsAssembly 
                                listViewItem.ImageIndex = (int)memberIcons.InternalProperty;
                        } 
                        else if (item is FieldInfo)
                        {
                            FieldInfo fi = (FieldInfo)item;
                            if (fi.IsPublic) 
                                listViewItem.ImageIndex = (int)memberIcons.PublicField;
                            else if (fi.IsPrivate) 
                                listViewItem.ImageIndex = (int)memberIcons.PrivateField; 
                            else if (fi.IsFamily || fi.IsFamilyAndAssembly || fi.IsFamilyOrAssembly)
                                listViewItem.ImageIndex = (int)memberIcons.ProtectedField; 
                            else // fi.IsAssembly
                                listViewItem.ImageIndex = (int)memberIcons.InternalField;
                        }
                        else if (item is ExtensionMethodInfo) 
                        {
                            listViewItem.ImageIndex = (int)memberIcons.ExtensionMethod; 
                        } 
                        else if (item is MethodInfo)
                        { 
                            MethodInfo mi = (MethodInfo)item;
                            if (mi.IsPublic)
                                listViewItem.ImageIndex = (int)memberIcons.PublicMethod;
                            else if (mi.IsPrivate) 
                                listViewItem.ImageIndex = (int)memberIcons.PrivateMethod;
                            else if (mi.IsFamily || mi.IsFamilyAndAssembly || mi.IsFamilyOrAssembly) 
                                listViewItem.ImageIndex = (int)memberIcons.ProtectedMethod; 
                            else // mi.IsAssembly
                                listViewItem.ImageIndex = (int)memberIcons.InternalMethod; 
                        }
                        else if (item is Type)
                            listViewItem.ImageIndex = (int)memberIcons.Type;
                    } 
                    this.listBoxAutoComplete.Items.Add(listViewItem);
                } 
            } 
            this.listBoxAutoComplete.Sort();
 
            if (this.listBoxAutoComplete.Items.Count > 0)
            {
                this.listBoxAutoComplete.Columns[0].Width = -2; // this will set the column size to the longest value
                this.listBoxAutoComplete.Size = new Size(this.listBoxAutoComplete.Items[0].Bounds.Width + 30, 72); 
            }
        } 
 
        internal void HideIntellisenceDropDown()
        { 
            this.listBoxAutoComplete.Hide();
            this.toolTip.Hide(this);
        }
 
        private void ShowIntellisenceDropDown(int charIndex)
        { 
            if (this.listBoxAutoComplete.Items.Count > 0) 
            {
                // Find the position of the caret 
                Point clientPoint = this.GetPositionFromCharIndex(charIndex -1);
                clientPoint.Y += (int)Math.Ceiling(this.Font.GetHeight()) + 2;
                clientPoint.X -= 6;
                if (charIndex > 0 && this.Text[charIndex-1] == '\n') 
                {
                    clientPoint.Y += (int)Math.Ceiling(this.Font.GetHeight()); 
                    clientPoint.X = this.GetPositionFromCharIndex(0).X - 6; 
                }
 
                Point parentScreenLocation = TopLevelControl.PointToScreen(new Point(0, 0));
                Point locationInDialog = PointToScreen(clientPoint);
                locationInDialog.Offset(-parentScreenLocation.X, -parentScreenLocation.Y);
 
                //Fix location and size to avoid clipping
                Size topLevelControlSize = (TopLevelControl is Form) ? ((Form)TopLevelControl).ClientSize : TopLevelControl.Size; 
                Rectangle listboxRectangle = new Rectangle(locationInDialog, this.listBoxAutoComplete.Size); 

                if (listboxRectangle.Right > topLevelControlSize.Width) 
                {
                    if (this.listBoxAutoComplete.Size.Width > topLevelControlSize.Width)
                        this.listBoxAutoComplete.Size = new Size(topLevelControlSize.Width, this.listBoxAutoComplete.Height);
 
                    locationInDialog = new Point(topLevelControlSize.Width - this.listBoxAutoComplete.Size.Width, locationInDialog.Y);
                } 
                if (listboxRectangle.Bottom > topLevelControlSize.Height) 
                    this.listBoxAutoComplete.Size = new Size(this.listBoxAutoComplete.Width, topLevelControlSize.Height - listboxRectangle.Top);
 
                // set position and show
                this.listBoxAutoComplete.Location = locationInDialog;
                this.listBoxAutoComplete.BringToFront();
                this.listBoxAutoComplete.Show(); 
            }
        } 
 
        private void UpdateIntellisenceDropDown(string text)
        { 
            AutoCompletionEventArgs autoCompletionEventArgs = new AutoCompletionEventArgs();
            autoCompletionEventArgs.Prefix = text;
            if (this.PopulateAutoCompleteList != null)
                this.PopulateAutoCompleteList(this, autoCompletionEventArgs); 

            PopulateListBox(autoCompletionEventArgs.AutoCompleteValues); 
        } 

        private void UpdateAutoCompleteSelection(string currentValue) 
        {
            bool wordMatched = false;

            if (string.IsNullOrEmpty(currentValue.Trim()) && this.listBoxAutoComplete.Items.Count > 0) 
            {
                wordMatched = true; 
                this.listBoxAutoComplete.Items[0].Selected = true; 
                this.listBoxAutoComplete.Items[0].Focused = true;
            } 
            else
            {
                for (int i = 0; i < this.listBoxAutoComplete.Items.Count; i++)
                { 
                    if (this.listBoxAutoComplete.Items[i].Text.StartsWith(currentValue, StringComparison.OrdinalIgnoreCase))
                    { 
                        wordMatched = true; 
                        this.listBoxAutoComplete.Items[i].Selected = true;
                        this.listBoxAutoComplete.Items[i].Focused = true; 
                        break;
                    }
                }
            } 
            if (!wordMatched && this.listBoxAutoComplete.SelectedItems.Count == 1)
                this.listBoxAutoComplete.SelectedItems[0].Selected = false; 
        } 

        private void ShowToolTip(int charIndex, string prefix) 
        {
            Point clientPoint = this.GetPositionFromCharIndex(charIndex - 1);
            clientPoint.Y += (int)Math.Ceiling(this.Font.GetHeight()) + 2;
            clientPoint.X -= 6; 

            AutoCompletionEventArgs autoCompletionEventArgs = new AutoCompletionEventArgs(); 
            autoCompletionEventArgs.Prefix = prefix; 

            if (this.PopulateToolTipList != null) 
            {
                this.PopulateToolTipList(this, autoCompletionEventArgs);

                if (autoCompletionEventArgs.AutoCompleteValues != null) 
                {
                    StringBuilder toolTipText = new StringBuilder(); 
                    bool firstMethod = true; 
                    foreach (MemberInfo memberInfo in autoCompletionEventArgs.AutoCompleteValues)
                    { 
                        if (firstMethod)
                            firstMethod = false;
                        else
                            toolTipText.Append("\n"); 

                        ParameterInfo[] parameters = null; 
 
                        MethodInfo methodInfo = memberInfo as MethodInfo;
                        if (methodInfo != null) 
                        {
                            toolTipText.Append(RuleDecompiler.DecompileType(methodInfo.ReturnType));
                            toolTipText.Append(" ");
                            toolTipText.Append(methodInfo.Name); 
                            toolTipText.Append("(");
 
                            parameters = methodInfo.GetParameters(); 
                        }
                        else 
                        {
                            // Must be constructor... if not, the best thing to do is let it throw "invalid cast".
                            ConstructorInfo ctorInfo = (ConstructorInfo)memberInfo;
 
                            toolTipText.Append(RuleDecompiler.DecompileType(ctorInfo.DeclaringType));
                            toolTipText.Append("("); 
 
                            parameters = ctorInfo.GetParameters();
                        } 


                        if (parameters != null && parameters.Length > 0)
                        { 
                            int lastParamIndex = parameters.Length - 1;
 
                            // Append the first parameter 
                            AppendParameterInfo(toolTipText, parameters[0], 0 == lastParamIndex);
                            for (int i = 1; i < parameters.Length; ++i) 
                            {
                                toolTipText.Append(", ");
                                AppendParameterInfo(toolTipText, parameters[i], i == lastParamIndex);
                            } 
                        }
 
                        toolTipText.Append(")"); 
                    }
                    this.toolTip.Show(toolTipText.ToString(), this, clientPoint); 
                }
            }
        }
 
        private static void AppendParameterInfo(StringBuilder toolTipText, ParameterInfo parameterInfo, bool isLastParameter)
        { 
            Type paramType = parameterInfo.ParameterType; 
            if (paramType != null)
            { 
                if (paramType.IsByRef)
                {
                    if (parameterInfo.IsOut)
                        toolTipText.Append("out "); 
                    else
                        toolTipText.Append("ref "); 
 
                    paramType = paramType.GetElementType();
                } 
                else if (isLastParameter && paramType.IsArray)
                {
                    object[] attrs = parameterInfo.GetCustomAttributes(typeof(ParamArrayAttribute), false);
                    if (attrs != null && attrs.Length > 0) 
                        toolTipText.Append("params ");
                } 
 
                toolTipText.Append(RuleDecompiler.DecompileType(paramType));
                toolTipText.Append(" "); 
            }
            toolTipText.Append(parameterInfo.Name);
        }
 
        private string CurrentPrefix
        { 
            get 
            {
                string textTillCaret = this.Text.Substring(0, this.SelectionStart); 

                int prefixStart = textTillCaret.LastIndexOfAny(" .()[]\t\r\n".ToCharArray());
                if (prefixStart >= 0)
                    return textTillCaret.Substring(prefixStart + 1); 
                else
                    return textTillCaret; 
            } 
        }
 
        #endregion

        #region override members
 
        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        { 
            // bail out an editcontrol before giving up on the dialog 
            if (this.listBoxAutoComplete.Visible)
            { 
                switch (keyData)
                {
                    case Keys.Enter:
                    case Keys.Tab: 
                        this.SelectItem();
                        HideIntellisenceDropDown(); 
                        return true; 
                    case Keys.Escape:
                        HideIntellisenceDropDown(); 
                        return true;
                    default:
                        break;
                } 
            }
            return base.ProcessCmdKey(ref msg, keyData); 
        } 

        #endregion 
    }

    #endregion
 
    #region AutoCompletionEventArgs
 
    internal class AutoCompletionEventArgs : EventArgs 
    {
        private string prefix; 
        ICollection autoCompleteValues;

        public ICollection AutoCompleteValues
        { 
            get
            { 
                return autoCompleteValues; 
            }
            set 
            {
                autoCompleteValues = value;
            }
        } 

        public string Prefix 
        { 
            get
            { 
                return prefix;
            }
            set
            { 
                prefix = value;
            } 
        } 
    }
 
    #endregion
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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