System.Diagnostics.Process.Start("www.csdn.net");
也可以指定用IE
System.Diagnostics.Process.Start("IEXPLORE.EXE","www.csdn.net");
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System.Diagnostics.ProcessStartInfo Info = new System.Diagnostics.ProcessStartInfo();
//设置外部程序名
Info.FileName = exePath;
//设置外部程序的启动参数(命令行参数)
Info.Arguments = filePath;
Info.CreateNoWindow = false;
//启动外部程序
System.Diagnostics.Process.Start(Info);