public void InitializeAdminReturn()
        {
            try
            {
                UserReturnBL userReturn = new UserReturnBL();
                DataSet      ds         = userReturn.GetAllReturnBL();

                ObservableCollection <ReturnedBook> lst = new ObservableCollection <ReturnedBook>();

                foreach (DataRow dr in ds.Tables[0].Rows)
                {
                    lst.Add(new ReturnedBook
                    {
                        BookName     = Convert.ToString(dr["BookName"]),
                        BookId       = Convert.ToInt32(dr["BookId"]),
                        UserId       = Convert.ToInt32(dr["UserId"]),
                        UserName     = Convert.ToString(dr["UserName"]),
                        DateReturned = Convert.ToString(Convert.ToDateTime(dr["DateReturned"]).ToShortDateString()),
                    });
                }
                dgReturn.ItemsSource = lst;
            }
            catch (Exception)
            {
                MessageBox.Show("Some unknown exception is occured!!!, Try again..");
            }
        }