【 tulaoshi.com - ASP.NET 】
                             
                             using System;
 using System.Threading;
 namespace KeyboardRecord
 {
 /// 
 /// Class1 的摘要说明。
 ///  class Class1
 {
 /// 
 /// 应用程序的主入口点。
 ///  [STAThread]
 static void Main(string[] args)
 {
 //
 // TODO: 在此处添加代码以启动应用程序
 //
 string a = Console.ReadLine();
 if (a.Length!=15) 
 {
 Console.WriteLine("Please input correct idnumber");
 }
 else
 {
 Console.WriteLine(getCheckCode(a));
 }
 }
 static string getCheckCode(string sfzh)
 {
 char[] strJiaoYan = {''1'', ''0'', ''X'', ''9'', ''8'', ''7'', ''6'', ''5'', ''4'', ''3'', ''2''};
 int[] intQuan = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1};
 string strTemp;
 int intTemp = 0;
 strTemp = sfzh.Substring(0,6) + "19" + sfzh.Substring(6);
 for (int i=0;i<=strTemp.Length-1;i++)
 {
 intTemp += int.Parse(strTemp.Substring(i,1))*intQuan[i];
 }
 intTemp = intTemp % 11;
 return strTemp + strJiaoYan[intTemp];
 }
 } }