public void TearDown()
 {
     _et = null;
 }
 public void TearDown()
 {
     _et = null;
 }
 public void Setup()
 {
     _et = new TestTool();
     _et.InvokeEvent += Target;
 }
 public void Setup()
 {
     _et              = new TestTool();
     _et.InvokeEvent += Target;
 }