private void BDelete_Click(object sender, EventArgs e) { if (tBAdresEdit.Text.Trim() != string.Empty || tBAdresEdit.Text.Trim() != "") { int id = Convert.ToInt32(tBIDEdit.Text); string text = tBAdresEdit.Text; using (var db = new ExtensionContext()) { var result = db.ListEmailsDB.SingleOrDefault(b => b.EmailsListId == id); if (result != null) { db.Entry(result).State = System.Data.Entity.EntityState.Deleted; db.SaveChanges(); } } } Reflesh(); this.dataGridView2.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells; this.dataGridView2.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill; tBAdresDelete.Text = ""; tBIDDelete.Text = ""; tBIDEdit.Text = ""; tBAdresEdit.Text = ""; }