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NegotiateStream.EndRead Method

Ends an asynchronous read operation that was started with a call to BeginRead.

Namespace:  System.Net.Security
Assembly:  System (in System.dll)
abstract EndRead : 
        asyncResult:IAsyncResult -> int  
override EndRead : 
        asyncResult:IAsyncResult -> int


Type: System.IAsyncResult

An IAsyncResult instance returned by a call to BeginRead

Return Value

Type: System.Int32
A Int32 value that specifies the number of bytes read from the underlying stream.

asyncResult is a null reference (Nothing in Visual Basic).


The asyncResult was not created by a call to BeginRead.


There is no pending read operation to complete.


The read operation failed.


Authentication has not occurred.

If the operation has not completed, this method blocks until it does.

To perform this operation synchronously, use the Read method.

You cannot call this method until you have successfully authenticated. To authenticate, call one of the AuthenticateAsClient, BeginAuthenticateAsClient, AuthenticateAsServer, or BeginAuthenticateAsServer methods.

The following code example demonstrates ending an asynchronous read operation. For an example that demonstrates starting the operation, see BeginRead.

No code example is currently available or this language may not be supported.

.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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