In MS Visual Studio Express 2013 for Windows Desktop:
I\'m learning C# and following an example that shows how to create a user interface in a .xaml file. https://ms
Tools>Option>XAML Designer and enable XAML Designer worked for me.
PS: By default it is enabled. I disabled it due to VS performance issue and forgot about this change and end up facing same issue when I started working on WPF project.