NegotiateStream.ImpersonationLevel Property

Gets a value that indicates how the server can use the client's credentials.

Namespace:  System.Net.Security
Assembly:  System (in System.dll)

public virtual TokenImpersonationLevel ImpersonationLevel { get; }


Authentication failed or has not occurred.

You must successfully authenticate before calling this method. Clients specify the impersonation level when they request authentication by calling one of the AuthenticateAsClient or BeginAuthenticateAsClient methods. If you authenticate without specifying a TokenImpersonationLevel , Identification is used.

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition Platform Note: These platforms use NTLM for authentication; NTLM does not support impersonation.

The following code example demonstrates displaying the value of this property.

 static void DisplayAuthenticationProperties(NegotiateStream stream)
     Console.WriteLine("IsAuthenticated: {0}", stream.IsAuthenticated);
    Console.WriteLine("IsMutuallyAuthenticated: {0}", stream.IsMutuallyAuthenticated);
    Console.WriteLine("IsEncrypted: {0}", stream.IsEncrypted);
    Console.WriteLine("IsSigned: {0}", stream.IsSigned);
    Console.WriteLine("ImpersonationLevel: {0}", stream.ImpersonationLevel);
    Console.WriteLine("IsServer: {0}", stream.IsServer);

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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