private void StopWorking()
 {
     if (_formWork == null)
     {
         return;
     }
     _formWork.Close();
     _formWork.Dispose();
     _formWork = null;
 }
 private void StartWorking(int count)
 {
     if (_formWork != null)
     {
         return;
     }
     _formWork = new FormWork();
     _formWork.Initialize(count);
     _formWork.Show(this);
 }