MethodImplAttributes Enumeration

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

Specifies flags for the attributes of a method implementation.

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

Syntax

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

	Member name	Description
	AggressiveInlining	Specifies that the method should be inlined wherever possible.
	CodeTypeMask	Specifies flags about code type.
	ForwardRef	Specifies that the method is not defined.
	IL	Specifies that the method implementation is in Microsoft intermediate language (MSIL).
	InternalCall	Specifies an internal call.
	Managed	Specifies that the method implementation is managed.
	ManagedMask	Specifies whether the code is managed or unmanaged.
	MaxMethodImplVal	Specifies a range check value.
	Native	Specifies that the method implementation is native.
	NoInlining	Specifies that the method cannot be inlined.
	NoOptimization	Specifies that the method is not optimized by the just-in-time (JIT) compiler when debugging possible code generation problems.
	OPTIL	Specifies that the method implementation is in optimized intermediate language (OPTIL).
	PreserveSig	Specifies that the method signature is exported exactly as declared.
	Runtime	Specifies that the method implementation is provided by the runtime.
	Synchronized	Specifies that the method is single-threaded through the body. Static methods (Shared methods in Visual Basic) lock on the type, whereas instance methods lock on the instance. You can also use the C# lock statement or the Visual Basic Lock function for this purpose.
	Unmanaged	Specifies that the method implementation is unmanaged.

The attributes are combined using the bitwise OR operation.

Code implementation masks:

Managed masks:

Implementation information and interop masks:

Note:
Locking on the instance or on the type, for example, by using the Synchronized flag, is not recommended for public types because code other than your own can take locks on public types and instances. This might cause deadlocks.