Added in generic ViewModel

src/core/Microsoft.PowerToys.Settings.UI/Helpers/Observable.cs

@@ -0,0 +1,24 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Microsoft.PowerToys.Settings.UI.Helpers
+{
+    public class Observable : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        protected void Set<T>(ref T storage, T value, [CallerMemberName]string propertyName = null)
+        {
+            if (Equals(storage, value))
+            {
+                return;
+            }
+
+            storage = value;
+            OnPropertyChanged(propertyName);
+        }
+
+        protected void OnPropertyChanged(string propertyName) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+}