/// <summary>
 /// 释放资源
 /// </summary>
 public void Dispose()
 {
     try
     {
         wsnToolTip.Dispose();
         wsnToolTip = null;
         instance   = null;
     }
     catch
     {
         return;
     }
 }
 /// <summary>
 /// 释放资源
 /// </summary>
 public void Dispose()
 {
     try
     {
         wsnToolTip.Dispose();
         wsnToolTip = null;
         instance = null;
     }
     catch
     {
         return;
     }
 }