private void btnSearch_Click(object sender, EventArgs e) { string searchingText = txtSearching.Text; List <Collection> findedCol = ManageUserAction.SearchCollectionName(searchingText); lvCollection.Items.Clear(); foreach (var col in findedCol) { lvCollection.Items.Add(col.NameCollection); } for (int i = 0; i < lvCollection.Items.Count; i++) { lvCollection.Items[i].ImageIndex = 0; } }