C# - 异常处理: try .. catch .. finally

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 异常处理_try_catch
{
    class Program
    {
        static void Main(string[] args)
        {
            //proTest_Try_Catch(222222299, 0, "/");
            proTest_Try_Catch(100, 10, "+");
           Console.ReadLine();
        }
        /// <proTest_Try_Catch>
        /// 
        /// 摘要:
        ///         测试异常处理 :　try..catch
        ///         
        /// </proTest_Try_Catch>
        /// <param name="obj1",     操作数1        ></param>
        /// <param name="obj2",     操作数2        ></param>
        /// <param name="Operators",       运算符     ></param>
        static void proTest_Try_Catch(int obj1, int obj2, string strOperators)
        {
            var result = 0;
            try
            {
                switch ( strOperators )
                {
                    case "+":
                        result = obj1 + obj2;
                        Console.WriteLine(result);
                        break;
                    case "-":
                        result = obj1 - obj2;
                        Console.WriteLine(result);
                        break;
                    case "*":
                        result = obj1 * obj2;
                        Console.WriteLine(result);
                        break;
                    case "/":
                        result = obj1 / obj2;
                        Console.WriteLine(result);
                        break;
                }
                if ( result > 100)
                {
                    throw new ApplicationException("哥的自定义异常消息!!!!!!!!!!!!!!!");
                }
            }
            catch (Exception e)             // 捕获【"哥的自定义异常消息!!!!!!!!!!!!!!!"】
            {
                MessageBox.Show("二货 : " + e.Message);
                return;                         // 就算有 return 异常处理还是会走到finally;
            }
            finally                              // 必须执行的代码
            {
                MessageBox.Show("哈哈哈");
            }

        }
    }
}