public MainViewModel()
{
if (!Execute.InDesignMode)
{
throw new InvalidOperationException("Constructor only accessible from design time");
}
Header = new HeaderViewModel();
LivestreamList = new LivestreamListViewModel();
}
public MainViewModel(HeaderViewModel header, LivestreamListViewModel livestreamList)
{
Header = header ?? throw new ArgumentNullException(nameof(header));
LivestreamList = livestreamList ?? throw new ArgumentNullException(nameof(livestreamList));
Header.ActivateWith(this);
Header.DeactivateWith(this);
LivestreamList.ActivateWith(this);
LivestreamList.DeactivateWith(this);
}
