Add how to bind enum article (#1056)

* add how to article

* Fix lint

* Fix the code example

* Add missing code

* Update how-to-bind-to-an-enumeration.md

* Update dotnet-desktop-guide/net/wpf/data/how-to-bind-to-an-enumeration.md

Co-authored-by: Tom Dykstra <[email protected]>

Co-authored-by: Tom Dykstra <[email protected]>

dotnet-desktop-guide/net/wpf/data/snippets/how-to-bind-to-an-enumeration/vb/MainWindow.xaml.vb

@@ -0,0 +1,7 @@
+Class MainWindow
+    Public Sub Method1()
+        '<EnumGetValues>
+        Dim enumValues = System.Enum.GetValues(GetType(System.Windows.HorizontalAlignment))
+        '</EnumGetValues>
+    End Sub
+End Class