gistfile1.txt

private void MapInterfaceMethods(FieldInfo classToWrapField, TypeBuilderHelper typeBuilder)
{
    //loop al interface methods
    foreach (var methodInfo in InterfaceToImplement.GetMethods())
    {
        //define the method in the generated type
        var emitter = typeBuilder.DefineMethod(methodInfo)
                        .Emitter
                            //this.[fieldName]
                            .ldarg_0
                            .ldfld(classToWrapField);

        for (var index = 0; index < methodInfo.GetParameters().Length; index++)
            //pushs all method arguments on the stack, so we can use them to 
            //call the targetMethod
            emitter.ldarg(index + 1);

        emitter
            //this.[fieldName].[MethodToImplement]([parameters])
            .callvirt(GetMappedMethod(methodInfo))
            //return
            .ret();
    }
}