title: Visual Studio Mac incompatible with dotnet core 2
body: <p>I've been using Visual Studio Mac for a little while and have just updated it to the released version. I've also downloaded and installed .NET Core 2.0 Preview 1. From a shell prompt I can generate a new Web API project:</p>
  
  <pre><code>dotnet2 davec$ dotnet --version
  2.0.0-preview1-005977
  dotnet2 davec$ dotnet new webapi
  The template "ASP.NET Core Web API" was created successfully.
  This template contains technologies from parties other than Microsoft, see https://aka.ms/template-3pn for details.
  
  Processing post-creation actions...
  Running 'dotnet restore' on dotnet2/dotnet2.csproj...
  Restore succeeded.
  </code></pre>
  
  <p>I can build and run that project from the shell. But when I open it in Visual Studio for Mac, the IDE tries and fails to restore:</p>
  
  <pre><code>Errors in dotnet2/dotnet2.csproj
      Unable to resolve 'Microsoft.NETCore.App (&gt;= 2.0.0)' for '.NETCoreApp,Version=v2.0'.
      Unable to resolve 'Microsoft.NETCore.App (&gt;= 2.0.0)' for '.NETCoreApp,Version=v2.0 (win)'.
      Unable to resolve 'Microsoft.NETCore.App (&gt;= 2.0.0)' for '.NETCoreApp,Version=v2.0 (win-x64)'.
      Unable to resolve 'Microsoft.NETCore.App (&gt;= 2.0.0)' for '.NETCoreApp,Version=v2.0 (win-x86)'.
  
  NuGet Config files used:
      ~/.config/NuGet/NuGet.Config
  
  Feeds used:
      https://api.nuget.org/v3/index.json
  Restore failed for 'Microsoft.NETCore.App (&gt;= 2.0.0)'.
  Restore failed.
  </code></pre>