Specifies that code or an assembly performs security-critical operations.
(in mscorlib.dll)
Visual Basic (Declaration)
<AttributeUsageAttribute(AttributeTargets.Assembly Or AttributeTargets.Module Or AttributeTargets.Class Or AttributeTargets.Struct Or AttributeTargets.Enum Or AttributeTargets.Constructor Or AttributeTargets.Method Or AttributeTargets.Property Or AttributeTargets.Field Or AttributeTargets.Event Or AttributeTargets.Interface Or AttributeTargets.Delegate, AllowMultiple := False, _
Inherited := False)> _
Public NotInheritable Class SecurityCriticalAttribute _
Inherits Attribute
Dim instance As SecurityCriticalAttribute
[AttributeUsageAttribute(AttributeTargets.Assembly|AttributeTargets.Module|AttributeTargets.Class|AttributeTargets.Struct|AttributeTargets.Enum|AttributeTargets.Constructor|AttributeTargets.Method|AttributeTargets.Property|AttributeTargets.Field|AttributeTargets.Event|AttributeTargets.Interface|AttributeTargets.Delegate, AllowMultiple = false,
Inherited = false)]
public sealed class SecurityCriticalAttribute : Attribute
.gif) Important Note: |
|---|
Types and members that have the SecurityCriticalAttribute cannot be used by Silverlight application code. Security-critical types and members can be used only by trusted code in the .NET Framework for Silverlight class library. |
Security-critical operations are actions that affect code access security, such as elevation of user rights, calling unsafe managed code, and so forth. The SecurityCriticalAttribute attribute must be applied to code for the code to perform security-critical operations. Operations that are not security-critical are described as either transparent or safe-critical. Transparent code cannot call security-critical code. However, transparent code can call types and members that are marked with the SecuritySafeCriticalAttribute attribute.
For assemblies that are installed with Silverlight, the presence of the SecurityCriticalAttribute at the assembly level identifies the entire assembly as security-critical. The SecurityCriticalAttribute is ignored when it is applied in user assemblies, that is, in assemblies that are not installed with the Silverlight library assemblies and that are not signed with a specific strong-name key.
System..::.Object
System..::.Attribute
System.Security..::.SecurityCriticalAttribute
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
Reference