关闭范围和垃圾收集

认为 如果异步任务及时完成,或者每次调用此代码时都会累积实例,则会发生这种情况。

//StartNew creates a new instance of System.Timers.Timer, and 
//  invokes the ActionOnTimeout after 2000ms, unless calling code
//  calls "Stop" first
var timeout = ProcessTimeout.StartNew(() => ActionOnTimeout(), 2000);

//DoAsyncTask creates a new thread, does potentially slow stuff, 
///   then invokes this callback
DoAsyncTask(() => 
    {
         if(timeout.Running)
         {
             timeout.Stop();
             DoCallbackStuff();
         }
    });

System.Timers.Timer )