private void DeleteLeavebtn_Click(object sender, RoutedEventArgs e)
        {
            bool deleteLeave = leaveBLL.DeleteLeaveBLL(LeaveEntity.LeaveRequestID);

            if (deleteLeave)
            {
                MessageBox.Show("Deleted successfully");
            }
            else
            {
                MessageBox.Show("Something went wrong..");
            }
        }