private void txtSearchAsset_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                if (_assetButtons != null)
                {
                    for (int i = 0; i < _assetButtons.Count; i++)
                    {
                        _assetButtons[i].Dispose();
                        this.Controls.Remove(_assetButtons[i]);
                    }
                }

                DataBaseAccess data = new DataBaseAccess();
                data.StartConnection();
                List <UserAsset> userAssets = data.SearchAsset(txtSearchAsset.Text);
                data.CloseConnection();
                _assetButtons = HelperTools.CreateAssetButtons(new Point(160, 150), formMain, this, userAssets.Count(), 2, userAssets);
            }
        }