@if (this.servers != null && this.servers.Count > 0)
{
  <ul>
    <Virtualize Items="this.servers" Context="server">
      <ServerComponent server="server"></ServerComponent>
    </Virtualize>
  </ul>
}

@code {
  [Parameter]
  public string? CityName { get; set; }
  private List<Server>? servers;

  protected override void OnParametersSet()
  {
    servers = ServersRepository.GetServersByCity(CityName ?? "Eindhoven");
  }
}