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AsymmetricAlgorithm.Create Method (String)

Updated: March 2011

Creates an instance of the specified implementation of an asymmetric algorithm.

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

public static AsymmetricAlgorithm Create(
	string algName
)

Parameters

algName
Type: System.String
The asymmetric algorithm implementation to use. The following table shows the valid values for the algName parameter and the algorithms they map to.

Parameter value

Implements

System.Security.Cryptography.AsymmetricAlgorithm

AsymmetricAlgorithm

RSA

RSA

System.Security.Cryptography.RSA

RSA

DSA

DSA

System.Security.Cryptography.DSA

DSA

ECDsa

ECDsa

ECDsaCng

ECDsaCng

System.Security.Cryptography.ECDsaCng

ECDsaCng

ECDH

ECDiffieHellman

ECDiffieHellman

ECDiffieHellman

ECDiffieHellmanCng

ECDiffieHellmanCng

System.Security.Cryptography.ECDiffieHellmanCng

ECDiffieHellmanCng

Return Value

Type: System.Security.Cryptography.AsymmetricAlgorithm
A new instance of the specified asymmetric algorithm implementation.

The following code example demonstrates how to implement the Create method in an extended class. This code example is part of a larger example provided for the AsymmetricAlgorithm class.


// The create function attempts to create a CustomCrypto object using
// the assembly name. This functionality requires modification of the
// machine.config file. Add the following section to the configuration
// element and modify the values of the cryptoClass to reflect what is
// installed in your machines GAC.
//<mscorlib>
// <cryptographySettings>
//   <cryptoNameMapping>
//     <cryptoClasses>
//       <cryptoClass CustomCrypto="Contoso.CustomCrypto, 
//         CustomCrypto, 
//         Culture=neutral, 
//         PublicKeyToken=fdb9f9c4851028bf, 
//         Version=1.0.1448.27640" />
//     </cryptoClasses>
//     <nameEntry name="Contoso.CustomCrypto" class="CustomCrypto" />
//     <nameEntry name="CustomCrypto" class="CustomCrypto" />
//    </cryptoNameMapping>
//  </cryptographySettings>
//</mscorlib>
new static public CustomCrypto Create(String algorithmName) 
{
    return (CustomCrypto) CryptoConfig.CreateFromName(algorithmName);
}


.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.

Date

History

Reason

March 2011

Added list of supported algorithm names.

Customer feedback.

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