gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Reflection.Emit;

namespace ConsoleApplication1
{
    class Program
    {
        public class Context
        {
            public int A;
        }

        public delegate void PineMethod(Context context);

        static void Main(string[] args)
        {
            var method = new DynamicMethod("test", typeof(void), new[] { typeof(Context) }, typeof(Program).Module);

            var gen = method.GetILGenerator();
            var a = typeof(Context).GetField("A");

            gen.Emit(OpCodes.Ldarg_0);
            gen.Emit(OpCodes.Dup);
            gen.Emit(OpCodes.Ldfld, a);
            gen.Emit(OpCodes.Ldc_I4, 10);
            gen.Emit(OpCodes.Add);
            gen.Emit(OpCodes.Stfld, a);

            var func = (PineMethod)method.CreateDelegate(typeof(PineMethod));

            var context = new Context();
            context.A = 5;

            func(context);

            Console.WriteLine("A = {0}", context.A);
        }
    }
}