using System;

using System.Reflection;

using System.Reflection.Emit;

​

public class Program

{

    public static void Main(string[] args)

    {

        var method = GetDM();

        var result = method.Invoke(null, new Object[]{"Test 1234", true});

        Console.WriteLine(result); // Should be 2

    }

    public static int Test(Object[] args)

    {

        Console.WriteLine(args.Length);

        return args.Length;

    }

    public static DynamicMethod GetDM() {  

        var returnType = typeof(int);

        var paramTypes = new Type[]{typeof(string), typeof(bool)};

        var method = new DynamicMethod(

            "",

            returnType,

            paramTypes,

            false

        );

        var il = method.GetILGenerator();

        // Save parameters in an object array

        il.Emit(OpCodes.Ldc_I4_S, paramTypes.Length);

        il.Emit(OpCodes.Newarr, typeof(Object));

        il.Emit(OpCodes.Dup);

        for (int i = 0; i < paramTypes.Length; i++)

        {

            Type type = paramTypes[i];

            il.Emit(OpCodes.Ldc_I4, i);

            il.Emit(OpCodes.Ldarg, i);

            if (type.IsValueType) { il.Emit(OpCodes.Box, type); }

            il.Emit(OpCodes.Stelem_Ref);

            il.Emit(OpCodes.Dup);

        }

        // Call method and get the length of the array

        // How do I return the result of the called method?

        var callMethod = typeof(Program).GetMethod("Test", (BindingFlags)(-1));

        il.Emit(OpCodes.Call, callMethod);

        il.Emit(OpCodes.Ret);

        return method;

    }

}