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GC::SuppressFinalize Method

Requests that the common language runtime not call the finalizer for the specified object.

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

static void SuppressFinalize(
	Object^ obj


Type: System::Object

The object whose finalizer must not be executed.


obj is nullptr.

This method sets a bit in the object header of obj, which the runtime checks when calling finalizers. A finalizer, which is represented by the Object::Finalize method, is used to release unmanaged resources before an object is garbage-collected. If obj does not have a finalizer, the call to the SuppressFinalize method has no effect.

Objects that implement the IDisposable interface can call this method from the object's IDisposable::Dispose implementation to prevent the garbage collector from calling Object::Finalize on an object that does not require it. Typically, this is done to prevent the finalizer from releasing unmanaged resources that have already been freed by the IDisposable::Dispose implementation.

The following example demonstrates how to use the SuppressFinalize method in a resource class to prevent a redundant garbage collection from being called. The example uses the dispose pattern to free both managed resources (that is, objects that implement IDisposable) and unmanaged resources.

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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