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SymmetricAlgorithm.Dispose Method

Releases all resources used by the current instance of the SymmetricAlgorithm class.

Namespace:  System.Security.Cryptography
Assembly:  mscorlib (in mscorlib.dll)

public void Dispose()



Call Dispose when you are finished using the SymmetricAlgorithm. The Dispose method leaves the SymmetricAlgorithm in an unusable state. After calling Dispose, you must release all references to the SymmetricAlgorithm so the garbage collector can reclaim the memory that the SymmetricAlgorithm was occupying.

For more information, see Cleaning Up Unmanaged Resources and Implementing a Dispose Method.


Always call Dispose before you release your last reference to the SymmetricAlgorithm. Otherwise, the resources it is using will not be freed until the garbage collector calls the SymmetricAlgorithm object's Finalize method.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, 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.