using System;
using System.Diagnostics;
using System.Linq.Expressions;

namespace SampleConsoleApp1
{
    static class StaticCast<TSource, TDestination>
    {
        private static Func<TSource, TDestination> cast = GenerateCast();

        private static Func<TSource, TDestination> GenerateCast()
        {
            var param = Expression.Parameter(typeof(TSource));
            var convert = Expression.Convert(param, typeof(TDestination));
            var lambda = Expression.Lambda<Func<TSource, TDestination>>(convert, param);
            return lambda.Compile();
        }

        public static TDestination Apply(TSource value) {
            return cast(value);
        }
    }

    class NumUpDownEx<T>
    {
        public decimal m_ud_value;
        public T Value
        {
            get { return StaticCast<decimal, T>.Apply(m_ud_value); }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var obj1 = new NumUpDownEx<int>();
            obj1.m_ud_value = 1234m;
            Console.WriteLine(1234 == obj1.Value);
            var obj2 = new NumUpDownEx<double>();
            obj2.m_ud_value = 3456.7m;
            Console.WriteLine((double)3456.7m == obj2.Value);
        }
    }
}