Debug 和 Release 意想不到的区别

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace statckt
{
    class trycalss
    {
        private int a;
        private int A
        {
            set { a = value; }
        
        }
        public void tryM(int x)
        {
            try
            {
                for (int i = 0; i < x; i++)
                {
                    A = 1 + 1;

                }
            }
            catch (Exception ex)
            {
             Console.Write(ex.ToString());
            }
        }
        public void M(int x)
        {
            
                for (int i = 0; i < x; i++)
                {
                    A= 1 + 1;

                }
        }
    }
  
    class Test
    {

          
           static void Main()
           { 
              
               trycalss t = new trycalss();
              
               DateTime dt = DateTime.Now;
               DateTime dt1 = DateTime.Now;
               TimeSpan ts = new TimeSpan();
              
               try
               {
                   int a =Convert.ToInt32(Console.ReadLine());
                   t.tryM(a);
                    ts = DateTime.Now - dt;
                   Console.WriteLine(ts.ToString());
                   dt = DateTime.Now;
                   t.M(1000000000);
                   ts = DateTime.Now - dt;
                   Console.WriteLine(ts.ToString());
                  
               }
               catch(Exception ex)
               {
                   Console.Write(ex.ToString());
               }
               ts = DateTime.Now - dt1;
               Console.WriteLine(ts.ToString());
               dt = DateTime.Now;
               t.tryM(1000000000);
               ts = DateTime.Now - dt;
               Console.WriteLine(ts.ToString());
               dt = DateTime.Now;
               t.M(1000000000);
               ts = DateTime.Now - dt;
               Console.WriteLine(ts.ToString());
               dt = DateTime.Now;
               t.tryM(2000000000);
               ts = DateTime.Now - dt;
               Console.WriteLine(ts.ToString());
               dt = DateTime.Now;
               t.M(2000000000);
               ts = DateTime.Now - dt;
               Console.WriteLine(ts.ToString());
               Console.Read();
           }
    }

}

debug：进行相同的计算，加入Try {}catch{}，会比没加的方法慢一倍右左;
Release: 进行相同的计算，加入Try {}catch{}，会比没加的方法更快;