Add dynamic playlist xml for diff frameworks

Author: kendrahavens

docs/test/run-unit-tests-with-test-explorer.md

@@ -228,7 +228,16 @@ You can also check or uncheck the boxes of the parent groups in the hierarchy. T
 
 ![Playlist xml file](../test/media/vs-2019/test-explorer-playlist-xml-file.png)
 
-If you would like to make a playlist for traits use the format below. Make sure there is a space between your `TestCategory` name and the `[Value]`.
+If you would like to make a playlist for traits use the format below for MSTest.
+```xml
+<Playlist Version="2.0">
+	<Rule Name="Includes" Match="Any">
+		<Property Name="Trait" Value="SchemaUpdateBasic" />
+	</Rule>
+</Playlist>
+```
+
+Use the format below for xUnit. Make sure there is a space between your `TestCategory` name and the `[Value]`.
 ```xml
 <Playlist Version="2.0">
   <Rule Name="Includes" Match="Any">