NotConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Core.Presentation / System / Activities / Core / Presentation / NotConverter.cs / 1305376 / NotConverter.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Activities.Core.Presentation 
{
    // Code borrowed from System.Activities.Presentation 
 
    using System;
    using System.ComponentModel; 
    using System.Windows;
    using System.Windows.Data;
    using System.Globalization;
    using System.Reflection; 
    using System.Diagnostics.CodeAnalysis;
 
    //  
    // Transform bool value using logical not.
    //  
    [SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses")]
    internal sealed class NotConverter : IValueConverter
    {
        // IValueConverter Members 

        public object Convert(object o, Type targetType, object parameter, CultureInfo culture) 
        { 
            return !(bool)o;
        } 

        public object ConvertBack(object o, Type targetType, object parameter, CultureInfo culture)
        {
            return !AssureBool(o, false); 
        }
 
        static bool AssureBool(object value, bool defaultIfNull) 
        {
            if (value is bool?) 
            {
                bool? nbValue = (bool?)value;

                if (nbValue.HasValue) 
                {
                    return nbValue.Value; 
                } 
                else
                { 
                    return defaultIfNull;
                }
            }
 
            return (bool)value;
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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