Iis7Helper.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Activation / Iis7Helper.cs / 1 / Iis7Helper.cs
                        

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

namespace System.ServiceModel.Activation 
{
    using Microsoft.Win32; 
    using System.Configuration; 
    using System.Collections;
    using System.Security.Permissions; 
    using System.Security;

    static class Iis7Helper
    { 
        static int iisVersion;
        static bool isIis7; 
 
        static Iis7Helper()
        { 
            isIis7 = GetIsIis7();
        }

        ///  
        /// Critical - uses SecurityCritical method to get version info from registry
        /// Safe - processes registry info into a safe bool for return 
        ///  
        [SecurityCritical, SecurityTreatAsSafe]
        static bool GetIsIis7() 
        {
            iisVersion = -1;
            object majorVersion = UnsafeGetMajorVersionFromRegistry();
            if (majorVersion != null && majorVersion.GetType().Equals(typeof(int))) 
            {
                iisVersion = (int)majorVersion; 
            } 
            return iisVersion >= 7;
        } 

        const string subKey = @"Software\Microsoft\InetSTP";

        ///  
        /// Critical - asserts registry access to get a single value from the registry
        ///            caller should not leak value 
        ///  
        [SecurityCritical]
        [RegistryPermission(SecurityAction.Assert, Read = @"HKEY_LOCAL_MACHINE\" + subKey)] 
        static object UnsafeGetMajorVersionFromRegistry()
        {
            using (RegistryKey localMachine = Registry.LocalMachine)
            { 
                using (RegistryKey versionKey = localMachine.OpenSubKey(subKey))
                { 
                    return versionKey != null ? versionKey.GetValue("MajorVersion") : null; 
                }
            } 
        }

        internal static int IisVersion { get { return iisVersion; } }
        internal static bool IsIis7 { get { return isIis7; } } 

    } 
} 

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

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