using System.Windows.Input; using GalaSoft.MvvmLight; using GalaSoft.MvvmLight.CommandWpf; namespace HandyControlDemo.ViewModel.Controls { public class BadgeDemoCtlViewModel : ViewModelBase { private int _count; public int Count { get => _count; set => Set(ref _count, value); } public ICommand CountCommand { get; } public BadgeDemoCtlViewModel() { Count = 1; CountCommand = new RelayCommand(() => Count++); } } }