目前对此并没有内置的功能，你需要使用自定义的方法，是这样的：

There is no built-in functionality for this, you'll need to use a custom method, something like:

TimeSpan ts = new TimeSpan(0, 70, 0);
String.Format("{0} hour{1} {2} minute{3}", 
              ts.Hours, 
              ts.Hours == 1 ? "" : "s",
              ts.Minutes, 
              ts.Minutes == 1 ? "" : "s")