CriticalHandle Class

For apps that target Windows Phone OS 7.0 and 7.1, do not use any members of this type in your app. If you do, your code will throw a MethodAccessException. This type is security-critical, which restricts it to internal use by the .NET Framework for Windows Phone class library.


[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Represents a wrapper class for handle resources.

Inheritance Hierarchy


Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)


<SecurityCriticalAttribute> _
Public MustInherit Class CriticalHandle _
    Implements IDisposable
public abstract class CriticalHandle : IDisposable

The CriticalHandle type exposes the following members.


Name Description
CriticalHandle Initializes a new instance of the CriticalHandle class with the specified invalid handle value.



Name Description
IsClosed Gets a value that indicates whether the handle is closed.
IsInvalid When overridden in a derived class, gets a value that indicates whether the handle value is invalid.



Name Description
Dispose()()() Releases all resources used by the CriticalHandle.
Dispose(Boolean) Security Critical. Releases the unmanaged resources used by the CriticalHandle class specifying whether to perform a normal dispose operation.
Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Finalize Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
GetType Gets the Type of the current instance. (Inherited from Object.)
MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
ReleaseHandle When overridden in a derived class, executes the code required to free the handle.
SetHandle Sets the handle to the specified pre-existing handle.
SetHandleAsInvalid Marks a handle as invalid.
ToString Returns a string that represents the current object. (Inherited from Object.)



Name Description
handle Specifies the handle to be wrapped.


Version Information

Windows Phone OS

Supported in: 8.1, 8.0

Thread Safety

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

See Also


System.Runtime.InteropServices Namespace