using System;

using System.Collections.Generic;

using    System.Linq.Expressions;  

public class Program

{

    public static void Main()

    {

  ParameterExpression paramExpr = Expression.Parameter(typeof(int), "arg");

​

            LambdaExpression lambdaExpr = Expression.Lambda(

                Expression.Add(

                    paramExpr,

                    Expression.Constant(1)

                ),

                new List<ParameterExpression>() { paramExpr }

            );

​

            Console.WriteLine(lambdaExpr);

​

            var method = lambdaExpr.Compile().Method;

            var expressions = new Expression[]

            {

                Expression.Constant(5)

            };

            Expression.Call(method, expressions);

            }

}