AuthenticatedStream Class

Note: This class is new in the .NET Framework version 2.0.

Provides methods for passing credentials across a stream and requesting or performing authentication for client-server applications.

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

public ref class AuthenticatedStream abstract : public Stream
public abstract class AuthenticatedStream extends Stream
public abstract class AuthenticatedStream extends Stream

This abstract class provides methods and properties that are common to authenticated streams.

Authenticated streams can provide authentication, data signing, and encryption services that can help maintain the integrity and confidentiality of data transmitted using the InnerStream.

The security protocol implemented by a class that derives from AuthenticatedStream together with the security protocols supported on the client and server will determine the security features that are available to an application. The NegotiateStream and SslStream classes inherit from AuthenticatedStream and implement the Negotiate and Secure Sockets Layer security protocols, respectively.

Notes to Inheritors The following members must be overridden in a derived class: IsAuthenticated, IsEncrypted, IsMutuallyAuthenticated, IsServer, and IsSigned.

The following code example demonstrates displaying the properties of an authenticated stream.

    // The following class displays the properties of an authenticatedStream.
    public class AuthenticatedStreamReporter
    public static void DisplayProperties(AuthenticatedStream 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("IsServer: {0}", stream.IsServer);


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0

Community Additions