private void btnRemoveFromList_Click(object sender, EventArgs e)
        {
            if (lst_Users.SelectedItems.Count == 0 || List_User_Application == null)
            {
                return;
            }

            User_cu selecteduser = (User_cu)lst_Users.SelectedItem;

            if (selecteduser == null)
            {
                return;
            }
            if (List_SelectedUserToBedAdded.Exists(
                    item => Convert.ToInt32(item.ID).Equals(Convert.ToInt32(selecteduser.ID))))
            {
                List_SelectedUserToBedAdded.Remove(selecteduser);
            }

            CommonViewsActions.FillListBoxControl(lst_Users, List_SelectedUserToBedAdded, "FullName", "Person_CU_ID");
            lst_Users.Refresh();

            User_Application_cu userBridge =
                List_User_Application.Find(
                    item => Convert.ToInt32(item.User_CU_ID).Equals(Convert.ToInt32(selecteduser.ID)));

            if (userBridge == null)
            {
                return;
            }
            List_User_Application.Remove(userBridge);
        }
        private void btnAddList_Click(object sender, EventArgs e)
        {
            if (lkeApplications.EditValue == null)
            {
                XtraMessageBox.Show("يجـب إختيــار البـرنـامج", "تنبيــــــــــه", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                return;
            }

            if (SelectedUserFromGrid == null)
            {
                XtraMessageBox.Show("يجب إختيــار مجمـوعــة المستخـدميـــن", "تنبيــــــــــه", MessageBoxButtons.OK,
                                    MessageBoxIcon.Hand);
                return;
            }

            if (List_SelectedUserToBedAdded == null)
            {
                List_SelectedUserToBedAdded = new List <User_cu>();
            }

            if (List_SelectedUserToBedAdded.Count > 0)
            {
                if (List_SelectedUserToBedAdded.Exists(
                        item => Convert.ToInt32(item.ID).Equals(Convert.ToInt32(SelectedUserFromGrid.ID))))
                {
                    XtraMessageBox.Show("تمــت إضافتـــه مـن قبـــل", "تنبيــــــــــه", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                    return;
                }
            }

            List_SelectedUserToBedAdded.Add(SelectedUserFromGrid);
            CommonViewsActions.FillListBoxControl(lst_Users, List_SelectedUserToBedAdded, "FullName", "Person_CU_ID");
            lst_Users.Refresh();

            User_Application_cu userBridge = new User_Application_cu();

            userBridge.User_CU_ID       = Convert.ToInt32(SelectedUserFromGrid.ID);
            userBridge.Application_P_ID = Convert.ToInt32(lkeApplications.EditValue);
            if (List_User_Application == null)
            {
                List_User_Application = new List <User_Application_cu>();
            }
            List_User_Application.Add(userBridge);
        }