public static void IsTrialValidTellNow() { Nullable <int> NumberOfItems = ItemsMgmt.SelectNumberOfItems(); if (NumberOfItems == null) { MessageBox.Show("ERROR 0x01 " + MsgTxt.DataBaseErrorTxt + " " + MsgTxt.PleaseCheckSQLServiceTxt, MsgTxt.DataBaseErrorTxt, MessageBoxButtons.OK, MessageBoxIcon.Error); Application.ExitThread(); Application.Exit(); } else { NumberOfItemsInTheSystem = int.Parse(NumberOfItems.ToString()); if (NumberOfItems < TrialNumberOfItems) { __IsTrialValid = true; } else { __IsTrialValid = false; } } }