private void gezginGetir() { string itemCode = TXTCode.Text; // //GridGezgin.Visible = true; CrossGeneralManager crossGeneralManager = new CrossGeneralManager(); gridData = crossGeneralManager.SearchCrossB2B(itemCode); GridItems.DataSource = gridData; var markalar = gridData.GroupBy(x => x.Marka).Select(x => x.Key).OrderBy(x => x).ToList(); CMBMarka.Items.Add("Tümü"); CMBMarka.Items.AddRange(markalar.ToArray()); this.Text = "Kayıt Sayısı :" + GridItems.Rows.Count; }