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ECDiffieHellmanCng Constructor (Int32)

Initializes a new instance of the ECDiffieHellmanCng class with a random key pair, using the specified key size.

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

public ECDiffieHellmanCng(
	int keySize


Type: System.Int32
The size of the key. Valid key sizes are 256, 384, and 521 bits.


keySize specifies an invalid length.


Cryptography Next Generation (CNG) classes are not supported on this system.

The random key pair will have the public key length defined by the keySize parameter.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)

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