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Marshal.GetFunctionPointerForDelegate<TDelegate> Method (TDelegate)

[Supported in the .NET Framework 4.5.1 and later versions]

Converts a delegate of a specified type to a function pointer that is callable from unmanaged code.

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

public static IntPtr GetFunctionPointerForDelegate<TDelegate>(
	TDelegate d

Type Parameters


The type of delegate to convert.


Type: TDelegate

The delegate to be passed to unmanaged code.

Return Value

Type: System.IntPtr
A value that can be passed to unmanaged code, which, in turn, can use it to call the underlying managed delegate.


The d parameter is null.

The delegate d is converted to a function pointer that can be passed to unmanaged code by using the __stdcall calling convention.

You must manually keep the delegate from being collected by the garbage collector from managed code. The garbage collector does not track references to unmanaged code.

.NET Framework

Supported in: 4.6, 4.5.1

Supported in: Windows Phone 8.1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

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