public void RemoveAt(int index) { _owner.CheckNoDataSource(); if (index < 0 || index >= Count) { throw new ArgumentOutOfRangeException(nameof(index), index, string.Format(SR.InvalidArgument, nameof(index), index)); } if (_owner.IsHandleCreated) { _owner.NativeRemoveAt(index); } _ownerComboBoxAccessibleObject.ItemAccessibleObjects.Remove(InnerList[index]); InnerList.RemoveAt(index); if (!_owner.IsHandleCreated && index < _owner._selectedIndex) { _owner._selectedIndex--; } if (_owner.AutoCompleteSource == AutoCompleteSource.ListItems) { _owner.SetAutoComplete(false, false); } }