c# System.Diagnostics一些调试使用

1. 运行时间精准测量
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
sw.Start();
//
// 监控用时的中间代码...
//
sw.Stop();
long len = sw.ElapsedMilliseconds;

//2.设置断言，打印输出
//如：重载窗口函数
protected override void OnResize(EventArgs e)
{
    base.OnResize(e);
    System.Diagnostics.Debug.Assert(this.Width > 200, "width should be larger than 200.");
    System.Diagnostics.Debug.WriteLine(this.Size.ToString()); 
}