CHG Moved files to new root folder.

Hardcodet.NotifyIcon.Wpf/Source/Sample Project/Tutorials/09 - MVVM/MvvmSampleViewModel.cs

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+using System;
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Threading;
+
+namespace Samples.Tutorials.MvvmSample
+{
+    public class MvvmSampleViewModel : INotifyPropertyChanged
+    {
+        private DispatcherTimer timer;
+
+        public string Timestamp
+        {
+            get { return DateTime.Now.ToLongTimeString(); }
+        }
+
+
+        public MvvmSampleViewModel()
+        {
+            timer = new DispatcherTimer(TimeSpan.FromSeconds(1), DispatcherPriority.Normal, OnTimerTick, Application.Current.Dispatcher);
+        }
+
+        private void OnTimerTick(object sender, EventArgs e)
+        {
+            //fire a property change event for the timestamp
+            Application.Current.Dispatcher.BeginInvoke(new Action(() => OnPropertyChanged("Timestamp")));
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        protected virtual void OnPropertyChanged(string propertyName)
+        {
+            PropertyChangedEventHandler handler = PropertyChanged;
+            if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}
+