Initial commit.

Shared/NotifyPropertyChangedBase.cs

@@ -0,0 +1,12 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace ClientApiPoC.Shared {
+    public abstract class NotifyPropertyChangedBase : INotifyPropertyChanged {
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        protected void OnPropertyChanged([CallerMemberName] string? propertyName = null) {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}