Create GridView namespace

Source/LibationWinForms/GridView/AsyncNotifyPropertyChanged.cs

@@ -0,0 +1,17 @@
+using Dinah.Core.Threading;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace LibationWinForms.GridView
+{
+	public abstract class AsyncNotifyPropertyChanged : SynchronizeInvoker, INotifyPropertyChanged
+	{
+		// see also notes in Libation/Source/_ARCHITECTURE NOTES.txt :: MVVM
+		public event PropertyChangedEventHandler PropertyChanged;
+
+		// per standard INotifyPropertyChanged pattern:
+		// https://docs.microsoft.com/en-us/dotnet/desktop/wpf/data/how-to-implement-property-change-notification
+		public void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
+			=> this.UIThreadAsync(() => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)));
+	}
+}