Unable to return Tuple from a method using Visual Studio 2017 and C# 7.0

Question

I\'ve installed Visual Studio 2017 Community that was released a week ago, and I started exploring the new features of C# 7.

So I created a simple method that return

Answer 1

I got this error too after updating to .NET 4.7.2 and was able to fix it by re-installing nuget packages using:

Update-Package -Reinstall