Displaying combobox with flag icon

<DxComboBox Data="@NaDSet"
                              @bind-Text="NwDset.Nationality"
                              @bind-Value="@NwDset.Nationality"
                              CssClass="cw-480" NullText="Nationality"
                              FilteringMode="@DataGridFilteringMode.Contains"
                              TextFieldName="@nameof(Nationality.Nationality1)"
                              ValueFieldName="@nameof(Nationality.Nationality1)">

                      <ItemTemplate>
                          <div class="combobox-item-template">
                              <img src="@GetImageFileName(context)" />
                              <div class="combobox-item-template-text">
                                  <span>@context.Nationality1</span>
                              </div>
                          </div>
                          @{
                              Flag = "NationalFlag/" + @NwDset.Nationality + ".png";
                          }
                      </ItemTemplate>
                  </DxComboBox>