Marshal.GetFunctionPointerForDelegate<TDelegate> Method (TDelegate)


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[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
Assembly:  mscorlib (in mscorlib.dll)

public static IntPtr GetFunctionPointerForDelegate<TDelegate>(
	TDelegate d


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.

Type Parameters


The type of delegate to convert.

Exception Condition

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.


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

Universal Windows Platform
Available since 8.1
.NET Framework
Available since 4.5.1
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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