CriticalHandle.IsInvalid Property
Microsoft Silverlight will reach end of support after October 2021. Learn more.
This type can be used only by trusted applications. If you try to use its members in a partial-trust application, your code will throw a MethodAccessException exception. This type is security-critical, which restricts its use.
[SECURITY CRITICAL]
When overridden in a derived class, gets a value that indicates whether the handle value is invalid.
Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public MustOverride ReadOnly Property IsInvalid As Boolean
public abstract bool IsInvalid { get; }
Property Value
Type: System.Boolean
true if the handle is valid; otherwise, false.
Version Information
Silverlight
Supported in: 5, 4, 3
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.