SafeHandle 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.

[SECURITY CRITICAL]

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

Represents a wrapper class for operating system handles. This class must be inherited.

Inheritance Hierarchy

System::Object
  System.Runtime.InteropServices::SafeHandle
    Microsoft.Win32.SafeHandles::SafeHandleMinusOneIsInvalid
    Microsoft.Win32.SafeHandles::SafeHandleZeroOrMinusOneIsInvalid

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

Syntax

C++

No code example is currently available or this language may not be supported.

The SafeHandle type exposes the following members.

Constructors

	Name	Description
	SafeHandle()	Initializes a new instance of the SafeHandle class using system defaults.
	SafeHandle(IntPtr, Boolean)	Initializes a new instance of the SafeHandle class with the specified invalid handle value.

Top

Properties

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

Top

Methods

	Name	Description
	Close	Security Critical. Marks the handle for releasing and freeing resources.
	DangerousAddRef	Security Critical. Manually increments the reference counter on SafeHandle instances.
	DangerousGetHandle	Returns the value of the handle field.
	DangerousRelease	Security Critical. Manually decrements the reference counter on a SafeHandle instance.
	Dispose()	Releases all resources used by the SafeHandle class.
	Dispose(Boolean)	Security Critical. Releases the unmanaged resources used by the SafeHandle 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	Security Critical. Marks a handle as no longer used.
	ToString	Returns a string that represents the current object. (Inherited from Object.)