C#代码运行时长

System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();

TimeSpan timeSpan=new TimeSpan(0, 0, 0, 0, 0);

double milliseconds = 0;

stopwatch.Start(); //开始

stopwatch.Stop(); //终止

timeSpan = stopwatch.Elapsed;

milliseconds = timeSpan.TotalMilliseconds;//得到要的毫秒值