Marshal::GetDelegateForFunctionPointer<TDelegate> Method (IntPtr)


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

Converts an unmanaged function pointer to a delegate of a specified type.

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

generic<typename TDelegate>
static TDelegate GetDelegateForFunctionPointer(
	IntPtr ptr


Type: System::IntPtr

The unmanaged function pointer to convert.

Return Value

Type: TDelegate

A instance of the specified delegate type.

Type Parameters


The type of the delegate to return.

Exception Condition

The TDelegate generic parameter is not a delegate, or it is an open generic type.


The ptr parameter is null.

You can use theGetDelegateForFunctionPointer<TDelegate>(IntPtr) andGetFunctionPointerForDelegate<TDelegate>(TDelegate)methods to marshal delegates in both directions.

TheGetDelegateForFunctionPointer<TDelegate>(IntPtr) method has the following restrictions:

  • You cannot pass an invalid function pointer to this method.

  • You can use this method only for pure unmanaged function pointers.

  • You cannot use this method with function pointers obtained through C++ or from the GetFunctionPointer method.

  • You cannot use this method to create a delegate from a function pointer to another managed delegate.


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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