title: Why is package restore failing when I upgrade to ASP.NET Core 1.0.1?
body: <p>I am attempting to install ASP.NET Core 1.0.1 on my windows 7 dev box which already has ASP.NET Core 1.0 working in Visual Studio Community 2015 Update 3.</p>
  
  <p>To accomplish this I installed <code>.NET Core 1.0.1 - VS 2015 Tooling Preview 2</code> from <a href="https://www.microsoft.com/net/core#windows" rel="nofollow noreferrer">https://www.microsoft.com/net/core#windows</a> as indicated by <a href="https://blogs.msdn.microsoft.com/dotnet/2016/09/13/announcing-september-2016-updates-for-net-core-1-0/" rel="nofollow noreferrer">https://blogs.msdn.microsoft.com/dotnet/2016/09/13/announcing-september-2016-updates-for-net-core-1-0/</a> </p>
  
  <p>I then updated several version numbers in my existing project.json file from 1.0.0 to 1.0.1 so that my web application would use the new 1.0.1 components.  </p>
  
  <p>As expected this triggers a package restore, but unfortunately it fails.  I can't figure out why the packages restore is failing.  Any help would be greatly appreciated.</p>
  
  <p><a href="https://i.stack.imgur.com/V9gqb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/V9gqb.png" alt="enter image description here"></a></p>
  
  <p>Here are the errors from the output window:</p>
  
  <p>Errors in C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive\src\wwwGiftOasisResponsive\wwwGiftOasisResponsive.xproj
      Unable to resolve 'Microsoft.AspNetCore.Server.IISIntegration (>= 1.0.1)' for '.NETFramework,Version=v4.5.2'.
  PATH=.\node_modules.bin;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Web\External;%PATH%;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Web\External\git
  C:\Program Files\dotnet\dotnet.exe restore "C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive.vs\restore.dg"
  log  : Restoring packages for C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive\src\wwwGiftOasisResponsive\project.json...
  error: Unable to resolve 'Microsoft.AspNetCore.Server.IISIntegration (>= 1.0.1)' for '.NETFramework,Version=v4.5.2'.
  log  : Restoring packages for tool 'Microsoft.AspNetCore.Server.IISIntegration.Tools' in C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive\src\wwwGiftOasisResponsive\project.json...
  log  : Writing lock file to disk. Path: C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive\src\wwwGiftOasisResponsive\project.lock.json
  log  : C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive\src\wwwGiftOasisResponsive\wwwGiftOasisResponsive.xproj
  log  : Restore failed in 2895ms.
  Errors in C:\Users\Ron Clabo\Documents\Visual Studio 2015\Projects\wwwGiftOasisResponsive\src\wwwGiftOasisResponsive\wwwGiftOasisResponsive.xproj
      Unable to resolve 'Microsoft.AspNetCore.Server.IISIntegration (>= 1.0.1)' for '.NETFramework,Version=v4.5.2'.</p>
  
  <p>My understanding is that the upgrade from ASP.NET Core 1.0 to 1.0.1 is suppose to be pretty easy so I must be missing something simple but after hours of looking I could really use some advice.</p>