Behaviors missing in Blend and VS2013 for XAML project but present in Javascript project

Question

When I open up a XAML project, the Error list will report issues with all behaviors on each page I have open. Examples of the are:

The name "EventTriggerBehavior" does not exist in the namespace "using:Microsoft.Xaml.Interactions.Core"
The name "Interaction" does not exist in the namespace "using:Microsoft.Xaml.Interactivity"

But I do have and confirmed the reference to BehaviorsXamlSDKManaged and the project does compile and run fine.

If I open up Blend, by either right clicking the solution explorer or opening it in windows explorer - Blend will report back the same errors and when I go to the Asset List - the behaviors will be blank

If I create a Javascript version, all behaviors are found.

I am stumped after spending a few days on this, any assistance would be greatly appreciated.

---- EDIT: I tried reinstalling VS2013

Answer 1

After updating to Visual Studio Update 2 - the issue was resolved.