WPF Frame Content Producing Audible Click (And I Don't Want the Click)

C# WPF .NET 4.0.

When assigning the frame content, an audible click is produced (like an unhandled event click). I don't want the audible click.

To be clear new Page1() does not pr开发者_开发知识库oduce the audible click. The Frame1.content line produces the click, but the click is only created going from Page1 to a new Page1 or from a Page1 to null. Null to null does NOT create a click. And null to new Page1() does not produce a click. Any ideas?

Page1 nextPage = new Page1("ctor string");
Frame1.content = nextPage;

Here's an answer from the wpf team. https://connect.microsoft.com:443/VisualStudio/feedback/details/345528/webbrowser-control-in-wpf-disable-sound