using CommunityToolkit.Mvvm.ComponentModel; using CommunityToolkit.Mvvm.Input; using CommunityToolkit.Mvvm.Messaging; namespace Ursa.Demo.ViewModels; public partial class ApplicationViewModel : ObservableObject { [RelayCommand] private void JumpTo(string header) { WeakReferenceMessenger.Default.Send(header, "JumpTo"); } }