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CngUIPolicy Class

Encapsulates optional configuration parameters for the user interface (UI) that Cryptography Next Generation (CNG) displays when you access a protected key.

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

[HostProtectionAttribute(SecurityAction.LinkDemand, MayLeakOnAbort = true)]
public sealed class CngUIPolicy


The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: MayLeakOnAbort. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

This class enables you to create a UI policy for displaying prompts about key operations such as smart card PIN prompts. It also enables you to enforce user interaction to access a key, even if the key is stored in a software key storage provider (KSP) instead of in a smart card. CNG displays these configuration parameters for the UI when you access a protected key.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows Server 2008 R2, Windows Server 2008

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

.NET Framework

Supported in: 3.5