Export (0) Print
Expand All

CngKey.Open Method (String, CngProvider, CngKeyOpenOptions)

Creates an instance of an CngKey object that represents an existing named key, using the specified key storage provider (KSP) and key open options.

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

public static CngKey Open(
	string keyName,
	CngProvider provider,
	CngKeyOpenOptions openOptions


Type: System.String

The name of the key.

Type: System.Security.Cryptography.CngProvider

The KSP that contains the key.

Type: System.Security.Cryptography.CngKeyOpenOptions

A bitwise combination of the enumeration values that specify options for opening the key, such as where the key is opened from (machine or user storage) and whether to suppress UI prompting.

Return Value

Type: System.Security.Cryptography.CngKey
An existing key.


keyName or provider is null.


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


All other errors.

Unlike the Open(String) method overload, this overload lets you specify both the provider and the key open options.

.NET Framework

Supported in: 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.

© 2014 Microsoft