public void Book_Load()
 {
     DGV_Books.DataSource = null;
     try
     {
         DGV_Books.DataSource = Obj_Data.FillBook_Data();
         DGV_Books.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }
 private void btn_AllBorrowedBooks_Click(object sender, EventArgs e)
 {
     DGV_Books.DataSource = null;
     try
     {
         DGV_Books.DataSource = Obj_Data.BorrowBooks();
         DGV_Books.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }