public DemoViewModel()
{
InnerViewModel = new InnerViewModel();
LoadWithMessage = new RelayCommandAsync(LoadWithMessageExecute);
LoadWithCancellation = new RelayCommandAsync(LoadWithCancellationExecute);
LoadWithNestedScopes = new RelayCommandAsync(LoadWithNestedScopesExecute);
LoadWithCustomBusyBox = new RelayCommandAsync(LoadWithCustomBusyBoxExecute);
}