Nuget에서 Microsoft.Toolkit.Mvvm 다운로드 public class MainViewModel : INotifyPropertyChanged { private int progressValue; public ICommand TestClick { get; set; } public MainViewModel() { TestClick = new AsyncRelayCommand(ExcuteMyButton); } public async Task ExcuteMyButton() { int w = 0; Task task1 = Task.Run(() => { for (int i = 0; i < 10; i++) { w = i; Thread.Sleep(500); ProgressValue += 10; } retur..