How can I make a simple test to verify that Visual Studio 2015 in Design Mode is executing my code?

Question

Working on a Visual Studio 2015 Windows Phone 8.1 app (Developing on Windows 10!), how can I make a simple test to verify that Visual Studio in Design Mode is executing my code?

I tried to put

Debug.WriteLine("DesignMode executing test");

in the constructor of a page, but when I load it in Design Viewer, nothing happens. I think the test I made isn't clever.

Answer 1

可以测试Component.DesignMode 。