title: Error: Cannot load file or assembly netstandard, Version=2.1.0.0
body: <p>I have a AzureFunctions project that I needed to upgrade to .NET standard 2.1 (from 2.0)  All of my other projects in the solution load and compile correctly but this AzureFunctions project is throwing this error:</p>
  
  <p>Error       System.IO.FileNotFoundException: Could not load file or assembly 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
  File name: 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'</p>
  
  <p>I've verified all the nuget packages are updated, what else could it be?</p>
  
  <p>Thanks!</p>