using Guidaoji; using Guidaoji.Common; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace Emergency_platform { public class Track { public void DS() { Timer timer = new Timer(TimerCallback, null, 0, 2000); } public void TimerCallback(object state) { for (int i = 0; i