title: Old C# projects not running in Microsoft visual studio 2017
body: <p>I last downloaded and used Microsoft visual studio 2017 for a C# class back in the spring. I have since opened and loaded an old project today and I get this when running it:</p>
  
  <p>“the current .NET SDK does not support targeting .NET Core 2.0. Either target .NET Core 1.1 or lower, or use a version of the .NET SDK that supports .NET Core 2.0."</p>
  
  <p>Any ideas as to why this is happening? When I open and run my c++ projects from the summer everything runs fine. </p>
  
  <p>Thank you!</p>