I'm having a problem since friday night. About this error. I didn't do anything but just installed the new Visual Studio Community RC 2017 in my computer. After that, these same errors appears on my Visual Studio 2015 and I can't able to run any cross platform development. What I did was, I uninstalled all of my visual studio in my computer and then just install the Visual Studio 2017 RC on my laptop. After creating a new project and running, I get these errors again. Somebody help me?