WMICapabilities.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Wmi / managed / System / Management / Instrumentation / WMICapabilities.cs / 1305376 / WMICapabilities.cs
                        
                        
                            namespace System.Management.Instrumentation 
{
    using System;
    using System.IO;
    using System.Security.Principal; 
    using Microsoft.Win32;
    using System.Diagnostics; 
    using System.Globalization; 
    using System.Runtime.Versioning;
 
    internal sealed class WMICapabilities
    {
        const string WMIKeyPath = @"Software\Microsoft\WBEM";
        const string WMINetKeyPath = @"Software\Microsoft\WBEM\.NET"; 
        const string WMICIMOMKeyPath = @"Software\Microsoft\WBEM\CIMOM";
 
        const string MultiIndicateSupportedValueNameVal = "MultiIndicateSupported"; 
        const string AutoRecoverMofsVal = "Autorecover MOFs";
        const string AutoRecoverMofsTimestampVal = "Autorecover MOFs timestamp"; 
        const string InstallationDirectoryVal = "Installation Directory";
        const string FrameworkSubDirectory = "Framework";

        ///  
        /// Key to WMI.NET information
        ///  
        static RegistryKey wmiNetKey; 
 	 static RegistryKey wmiKey;
	 
        [ResourceExposure(ResourceScope.None),ResourceConsumption(ResourceScope.Machine,ResourceScope.Machine)]
        static WMICapabilities ()
        {
		wmiNetKey = Registry.LocalMachine.OpenSubKey(WMINetKeyPath, false); 
              wmiKey = Registry.LocalMachine.OpenSubKey(WMIKeyPath, false);
        } 
 
        /// 
        /// Indicates if IWbemObjectSink supports calls with multiple objects. 
        /// On some versions of WMI, IWbemObjectSink will leak memory if
        /// Indicate is called with lObjectCount greater than 1.
        /// If the registry value,
        /// HKLM\Software\Microsoft\WBEM\.NET\MultiIndicateSupported 
        /// exists and is non-zero, it is assumed that we can call Indicate
        /// with multiple objects. 
        /// Allowed values 
        /// -1 - We have not determined support for multi-indicate yet
        ///  0 - We do not support multi-indicate 
        ///  1 - We support multi-indicate
        /// 
        static int multiIndicateSupported = -1;
        static public bool MultiIndicateSupported 
        {
            get 
            { 
                if(-1 == multiIndicateSupported)
                { 
                    // Default multi-indicate support to what we think is
                    // possible based on the OS.
                    // This should be true for whistler, or Nova with FastProx.dll FilePrivatePart is >= 56.
                    multiIndicateSupported = MultiIndicatePossible()?1:0; 

                    // See if there is a WMI.NET key 
                    if(wmiNetKey != null) 
                    {
                        // Try to get the 'MultiIndicateSupported' value 
                        // Default to the default value in multiIndicateSupported
                        Object result = wmiNetKey.GetValue(MultiIndicateSupportedValueNameVal, multiIndicateSupported);

                        // The value should be a DWORD (returned as an 'int'), and is 1 if supported 
                        if(result.GetType() == typeof(int) && (int)result==1)
                            multiIndicateSupported = 1; 
                    } 
                }
                return multiIndicateSupported == 1; 
            }
        }

        [ResourceExposure(ResourceScope.None),ResourceConsumption(ResourceScope.Machine,ResourceScope.Machine)] 
        static public void AddAutorecoverMof(string path)
        { 
            RegistryKey wmiCIMOMKey = Registry.LocalMachine.OpenSubKey(WMICIMOMKeyPath, true); 
            if(null != wmiCIMOMKey)
            { 
                object mofsTemp = wmiCIMOMKey.GetValue(AutoRecoverMofsVal);
                string [] mofs = mofsTemp as string[];
                    if(null == mofs)
                    { 
                        if(null != mofsTemp)
                        { 
                            // Oh No!  We have a auto recover key, but it is not reg multistring 
                            // We just give up
                            return; 
                        }
                        mofs = new string[] {};
                    }
 
                // We ALWAYS update the autorecover timestamp
                wmiCIMOMKey.SetValue(AutoRecoverMofsTimestampVal, DateTime.Now.ToFileTime().ToString((IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int64)))); 
 
                // Look for path in existing autorecover key
                foreach(string mof in mofs) 
                {
                    if(String.Compare(mof, path, StringComparison.OrdinalIgnoreCase) == 0)
                    {
                        // We already have this MOF 
                        return;
                    } 
                } 

                // We have the array of strings.  Now, add a new one 
                string [] newMofs = new string[mofs.Length+1];
                mofs.CopyTo(newMofs, 0);
                newMofs[newMofs.Length-1] = path;
 
                wmiCIMOMKey.SetValue(AutoRecoverMofsVal, newMofs);
                wmiCIMOMKey.SetValue(AutoRecoverMofsTimestampVal, DateTime.Now.ToFileTime().ToString((IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int64)))); 
            } 
        }
 
        static string installationDirectory = null;
        public static string InstallationDirectory
        {
            get 
            {
                if(null == installationDirectory && null != wmiKey) 
                    installationDirectory = wmiKey.GetValue(InstallationDirectoryVal).ToString(); 
                return installationDirectory;
            } 
        }

        public static string FrameworkDirectory
        { 
            get
            { 
                return Path.Combine(InstallationDirectory, FrameworkSubDirectory); 
            }
        } 

        public static bool IsUserAdmin()
        {
            // Bug#89083 - If we are on Win9x, we are always assumed to be an admin 
            if(Environment.OSVersion.Platform == PlatformID.Win32Windows)
                return true; 
            WindowsPrincipal principal = new WindowsPrincipal(WindowsIdentity.GetCurrent()); 
            return (principal.Identity.IsAuthenticated && principal.IsInRole(WindowsBuiltInRole.Administrator));
        } 

        static bool IsNovaFile(FileVersionInfo info)
        {
            // A file is a Nova version if Major=1, Minor=50, and Build=1085 
            return (    info.FileMajorPart==1
                &&  info.FileMinorPart==50 
                &&  info.FileBuildPart==1085); 
        }
 
       [ResourceExposure(ResourceScope.None),ResourceConsumption(ResourceScope.Machine,ResourceScope.Machine)]
       static bool MultiIndicatePossible()
        {
            // If we are on Whistler or above, we are OK 
            // - Platform == Win32NT and OS version >= 5.1.0.0
            // - MajorVersion > 5 or (MajorVersion == 5 && MinorVersion > 0) 
            OperatingSystem os = Environment.OSVersion; 
            if(os.Platform==PlatformID.Win32NT &&  os.Version >= new Version(5, 1))
                return true; 


            // We know that we can do multi-indicate if we are running Nova,
            // and the FastProx.dll FilePrivatePart is >= 56. 
            string fastproxPath = Path.Combine(Environment.SystemDirectory, @"wbem\fastprox.dll");
            FileVersionInfo info = FileVersionInfo.GetVersionInfo(fastproxPath); 
            if(IsNovaFile(info) && info.FilePrivatePart>=56) 
                return true;
 
            return false;
        }

        public static bool IsWindowsXPOrHigher() 
        {
            // If we are on Whistler or above, we are OK 
            // - Platform == Win32NT and OS version >= 5.1.0.0 
            // - MajorVersion > 5 or (MajorVersion == 5 && MinorVersion > 0)
            OperatingSystem os = Environment.OSVersion; 
            if(os.Platform==PlatformID.Win32NT && os.Version >= new Version(5, 1))
                return true;
            return false;
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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WMICapabilities.cs source code in C# .NET

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