https://learn.microsoft.com/en-us/dotnet/api/microsoft.visualstudio.testtools.uitesting.uitestcontrol.istopparent?view=visualstudiosdk-2017
UITestControl.IsTopParent Property (Microsoft.VisualStudio.TestTools.UITesting) | Microsoft Learn
Learn more about the Microsoft.VisualStudio.TestTools.UITesting.UITestControl.IsTopParent in the Microsoft.VisualStudio.TestTools.UITesting namespace.
propertymicrosoftvisualstudiotesttoolslearn