public static EditTripWindow GetInstance()
{
if (_instance == null)
{
_instance = new EditTripWindow();
}
return(_instance);
}
private void OnWindowClosed(object sender, EventArgs e)
{
_instance = null;
}
private void OnWindowClosing(object sender, CancelEventArgs e)
{
ParentWindow.NotifyEditWindowClosing();
this.SavePlacement();
_instance = null;
}