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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; }
ExceptionCondition
InvalidOperationException

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: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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