I am tying to build an app in Visual Studio 2015 in C# and I want to create a User Interface using Blend. But it shows me only the code in MainPage.xaml, not the graphic vie
Sorry for the late response and potential solution, but I figure it's good to record the solution I found. I ran into this problem as well (with a VB project). The problem was caused when I put in a label on the form, and then I got some weird error... I told VS (2015 Community) to ignore the error as I was going to remove the element anyway... but in the process, VS decided to break the Form1.vb file completely (it was blanked out) and SAVE it when I never told it to do so...
The solution was to manually edit the Form1.vb file and restore what was supposed to be in there, which in my case was simply:
Public Class Form1
End Class
After making this edit manually, I was able to reopen the project and the "Design view" was available again (via right-click). Again, not sure why VS decided to save over my working program after it caught some error (that's the LAST thing you'd want to do when you get an error!) but I guess that just means I'll need to be more careful and make backups as I program to work around that crazy behavior.