Move examples from root to /Examples

Examples/Examples.WPF/ViewModels/ViewModelBase.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Examples.WPF.ViewModels;
+
+public abstract class ViewModelBase : INotifyPropertyChanged {
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    public void PropChange(string _name) {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(_name));
+    }
+
+    protected void OnPropChange([CallerMemberName] string propertyName = null) {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+
+}