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CryptoStream Constructor

Initializes a new instance of the CryptoStream class with a target data stream, the transformation to use, and the mode of the stream.

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

Public Sub New ( _
	stream As Stream, _
	transform As ICryptoTransform, _
	mode As CryptoStreamMode _


Type: System.IO.Stream
The stream on which to perform the cryptographic transformation.
Type: System.Security.Cryptography.ICryptoTransform
The cryptographic transformation that is to be performed on the stream.
Type: System.Security.Cryptography.CryptoStreamMode
One of the CryptoStreamMode values.


stream is not readable.


stream is not writable.


stream is invalid.

Any object that derives from Stream can be passed into the stream parameter. Any object that implements ICryptoTransform (such as HashAlgorithm) can be passed into the transform parameter.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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.