MSVS 2015 with Xamarin Error on creating Blank App( Xamarin.Forms Portable)

Question

I installed Visual Studio 2015 successfully but on stage of creating a new Project when I choose "Blank App (Xamarin.Forms Portable)" I've got this error:

I updated Nuget Package Manager and Xamarin.Forms and checked folder Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETPortable (I have v4.0,v4.5,v4.6,v5.0).

But nothing changed. That's my first experience with MSVS. How can I fix this problem?

System Setup:

• Windows 7 SP1
• Visual Studio 14.0.25123.00 Update 2
• .NET Framework Version 4.6.01055

Answer 1

Have you made sure your Forms project is targeting .NET 4.5 or higher?

Right-click your Forms project in Solution explorer and choose Properties (near the bottom of context menu), then go to the Library tab.