1 static class Program
 2     {
 3         /// <summary>
 4         /// 应用程序的主入口点。
 5         /// </summary>
 6         [STAThread]
 7         static void Main(string[] Args)
 8         {
 9             Application.EnableVisualStyles();
10             Application.SetCompatibleTextRenderingDefault(false);
11             System.Security.Principal.WindowsIdentity identity = System.Security.Principal.WindowsIdentity.GetCurrent();
12             System.Security.Principal.WindowsPrincipal principal = new System.Security.Principal.WindowsPrincipal(identity);
13             bool createNew;
14             //通过Mutex对象判断程序是否已经启动
15             using (System.Threading.Mutex mutex = new System.Threading.Mutex(true, Application.ProductName, out createNew))
16             {
17                 if (createNew)
18                 {
19                     if (principal.IsInRole(System.Security.Principal.WindowsBuiltInRole.Administrator))
20                     {
21                         //如果是管理员，则直接运行   
22                         //AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
23                         //Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
24                         Application.Run(new MainForm());
25                     }
26                     else
27                     {
28                         //创建启动对象   
29                         System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
30                         
31                         //设置运行文件   
32                         startInfo.FileName = System.Windows.Forms.Application.ExecutablePath;
33                         //设置启动参数   
34                         startInfo.Arguments = String.Join(" ", Args);
35                         //设置启动动作,确保以管理员身份运行   
36                         startInfo.Verb = "runas";
37                         //如果不是管理员，则启动UAC   
38                         System.Diagnostics.Process.Start(startInfo);
39                         //退出   
40                         System.Windows.Forms.Application.Exit();
41                     }
42                 }
43                 else
44                 {
45                     MessageBox.Show("程序已经在运行中...", "提示", MessageBoxButtons.OK,
46                          MessageBoxIcon.Asterisk);
47                     System.Threading.Thread.Sleep(1000);
48                     System.Environment.Exit(1);
49                 }
50             }
51         }
52     }