namespace WPF_26_MVVM.ViewModels; public class MainViewModel : BindableBase { private readonly IRegionManager _regionManager; public MainViewModel(IRegionManager regionManager) { _regionManager = regionManager; OpenCommand = new DelegateCommand(Open); } public DelegateCommand OpenCommand { get; private set; } private void Open(string viewName) { // _regionManager.RequestNavigate("Body", viewName); _regionManager.Regions["ContentRegion"].RequestNavigate(viewName); } }