This documentation is archived and is not being maintained.

MethodBuilder.SetMarshal Method

Note: This API is now obsolete.

Sets marshaling information for the return type of this method.

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

[ObsoleteAttribute("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
public void SetMarshal(
	UnmanagedMarshal unmanagedMarshal


Type: System.Reflection.Emit.UnmanagedMarshal
Marshaling information for the return type of this method.


The containing type was previously created using CreateType.


For the current method, the IsGenericMethod property is true, but the IsGenericMethodDefinition property is false.

The code sample below illustrates the contextual usage of the SetMarshal method to marshal the results of a method call as a different type.

	MethodBuilder myMethod = myDynamicType.DefineMethod("MyMethodReturnsMarshal",
						new Type[] { typeof(string) });

	// We want the return value of our dynamic method to be marshalled as 
	// an 64-bit (8-byte) signed integer, instead of the default 32-bit
   	// unsigned int as specified above. The UnmanagedMarshal class can perform
	// the type conversion.

	UnmanagedMarshal marshalMeAsI8 = UnmanagedMarshal.DefineUnmanagedMarshal(


.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

.NET Framework Client Profile

Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.