protected void AddDGroupButton_Click(object sender, EventArgs e)
        {
            Button btn = (Button)sender;
            String btnId = btn.ID;

            if (btnId.Equals("AddDGroupButton"))
            {
                if (IsValid)
                {
                    System.Threading.Thread.Sleep(3000);
                    var groupName = NameTextBox.Text;

                    var drugGroup = new DrugGroup() { drugGroupName = groupName};
                    _dataContext.DrugGroups.InsertOnSubmit(drugGroup);
                    _dataContext.SubmitChanges();
                    DrugGroupList.DataBind();

                    ResetInputField();
                }
            }
            else if (btnId.Equals("ResetDGroupButton"))
            {
                ResetInputField();
            }
        }
 partial void DeleteDrugGroup(DrugGroup instance);
 partial void UpdateDrugGroup(DrugGroup instance);
 partial void InsertDrugGroup(DrugGroup instance);