title: error CS0430: The extern alias 'snh' was not specified in a /reference option [Up.UnitTests\obj\x64\Debug\Fakes\wsc\f.csproj]
body: <p>Unit test project Up.UnitTests fails during build, with this build errors</p>
  
  <p>error CS0430: The extern alias 'snh' was not specified in a /reference option
  error CS0234: The type or namespace name 'System' does not exist in the namespace 'snh' (are you missing an assembly reference?) </p>
  
  <p>The type or namespace name 'System' does not exist in the namespace 'snh'</p>
  
  <p>I am guessing the above errors are due to System.Net.Http. Is it anything to do with different versions? How to fix this issue. Any help would be appreciated.</p>