title: Nuget restore fails for ASP.NET Core 2.0 project on build server
body: <p>I am trying to build an ASP.NET Core 2.0 application for .NET Framework 4.6.2 (not .NET Core) with TeamCity on Windows Server 2012R2.</p>
  
  <p>The following components are installed in the server:</p>
  
  <ul>
  <li>Microsoft .Net Core SDK - 2.0.0.0</li>
  <li>Microsoft .Net Framework (4.5.2, 4.6, 4.6.2)</li>
  <li>Microsoft Build Tools (2013, 2015, 2017)</li>
  <li>Windows SDK 10.0</li>
  <li>... </li>
  </ul>
  
  <p>TeamCity uses nuget version 4.1 and the solution file to restore dependent packages (see full log below for details).</p>
  
  <p><strong>Error:</strong></p>
  
  <pre><code>[22:57:51]
  [22:57:51]Errors in C:\path\to\project\Server\Server.csproj
  [22:57:51]    Package Microsoft.AspNetCore 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2). Package Microsoft.AspNetCore 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51]    Package Microsoft.AspNetCore.Mvc 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2). Package Microsoft.AspNetCore.Mvc 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51]    One or more packages are incompatible with .NETFramework,Version=v4.6.2.
  [22:57:51]    Package Microsoft.AspNetCore 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2) / win7-x86. Package Microsoft.AspNetCore 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51]    Package Microsoft.AspNetCore.Mvc 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2) / win7-x86. Package Microsoft.AspNetCore.Mvc 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51]    One or more packages are incompatible with .NETFramework,Version=v4.6.2 (win7-x86).
  [22:57:51]
  [22:57:51]Errors in C:\path\to\project\Server\Server.csproj
  [22:57:51]    Package Microsoft.Extensions.FileProviders.Physical 2.0.0 is not compatible with netcoreapp2.0 (.NETCoreApp,Version=v2.0). Package Microsoft.Extensions.FileProviders.Physical 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51]    Package Microsoft.VisualStudio.Web.CodeGeneration.Contracts 2.0.0 is not compatible with netcoreapp2.0 (.NETCoreApp,Version=v2.0). Package Microsoft.VisualStudio.Web.CodeGeneration.Contracts 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51]    One or more packages are incompatible with .NETCoreApp,Version=v2.0.
  [22:57:51]Process exited with code 1
  </code></pre>
  
  <hr>
  
  <p><strong>Question:</strong></p>
  
  <p>I thought that .NET Framework 4.6.2 implements .NET Standard 2.0, therefore I don't understand why the packages are incompatible. On my local machine (with Visual Studio 2017 Update 3 (15.3)) nuget restore works fine.</p>
  
  <p>Any ideas how to solve that error / how to further analyze the problem?</p>
  
  <hr>
  
  <p><strong>Project File</strong> (containing the nuget packages):</p>
  
  <pre><code>&lt;Project Sdk="Microsoft.NET.Sdk.Web"&gt;
    &lt;PropertyGroup&gt;
      &lt;TargetFramework&gt;net462&lt;/TargetFramework&gt;
    &lt;/PropertyGroup&gt;
    &lt;ItemGroup&gt;
      &lt;Folder Include="wwwroot\" /&gt;
    &lt;/ItemGroup&gt;
    &lt;ItemGroup&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore" Version="2.0.0" /&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.0.0" /&gt;
      &lt;PackageReference Include="Newtonsoft.Json" Version="10.0.3" /&gt;
    &lt;/ItemGroup&gt;
    &lt;ItemGroup&gt;
      &lt;DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" /&gt;
    &lt;/ItemGroup&gt;
    &lt;ItemGroup&gt;
      &lt;ProjectReference Include="..\Server.Common\Server.Common.csproj" /&gt;
    &lt;/ItemGroup&gt;
  &lt;/Project&gt;
  </code></pre>
  
  <p><strong>Full Log Output</strong></p>
  
  <pre><code>[Step 1/4] restore: Restoring NuGet packages for Server.sln (24s)
  [22:57:27][restore] NuGet command: C:\path\to\buildagent\tools\NuGet.CommandLine.4.1.0\tools\NuGet.exe restore C:\path\to\project\Server.sln
  [22:57:27][restore] Starting: C:\path\to\teamcity\temp\agentTmp\custom_script710236021428854.cmd
  [22:57:27][restore] in directory: C:\path\to\project
  [22:57:28][restore] MSBuild auto-detection: using msbuild version '15.3.409.57025' from 'C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\MSBuild\15.0\bin'.
  [22:57:31][restore] Alle in "packages.config" aufgef�hrten Pakete sind bereits installiert.
  [22:57:31][restore] Restoring packages for C:\path\to\project\Server\Server.csproj...
  [22:57:31][restore] Restoring packages for C:\path\to\project\Server\Server.csproj...
  [22:57:32][restore]   GET https://api.nuget.org/v3-flatcontainer/microsoft.visualstudio.web.codegeneration.tools/index.json
  [22:57:32][restore]   GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnetcore.mvc/index.json
  [22:57:32][restore]   GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnetcore/index.json
  [...]
  [22:57:41][restore]   OK https://api.nuget.org/v3-flatcontainer/microsoft.netcore.dotnetapphost/index.json 475ms
  [22:57:41][restore]   GET https://api.nuget.org/v3-flatcontainer/microsoft.netcore.dotnetapphost/2.0.0/microsoft.netcore.dotnetapphost.2.0.0.nupkg
  [22:57:41][restore]   OK https://api.nuget.org/v3-flatcontainer/microsoft.netcore.dotnetapphost/2.0.0/microsoft.netcore.dotnetapphost.2.0.0.nupkg 453ms
  [22:57:42][restore] Installing System.Xml.XmlSerializer 4.0.11.
  [22:57:42][restore] Installing System.Threading.Overlapped 4.0.1.
  [22:57:42][restore] Installing System.Security.Principal 4.0.1.
  [22:57:42][restore] Installing System.Dynamic.Runtime 4.0.11.
  [22:57:42][restore] Installing System.Private.DataContractSerialization 4.1.1.
  [22:57:42][restore] Installing Microsoft.Win32.Registry 4.0.0.
  [...]
  [22:57:48][restore] Installing System.Diagnostics.Contracts 4.0.1.
  [22:57:48][restore] Installing System.Threading.Tasks.Dataflow 4.6.0.
  [22:57:48][restore] Installing System.IO.Pipes 4.0.0.
  [22:57:51][restore] Package Microsoft.Extensions.FileProviders.Physical 2.0.0 is not compatible with netcoreapp2.0 (.NETCoreApp,Version=v2.0). Package Microsoft.Extensions.FileProviders.Physical 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore] Package Microsoft.VisualStudio.Web.CodeGeneration.Contracts 2.0.0 is not compatible with netcoreapp2.0 (.NETCoreApp,Version=v2.0). Package Microsoft.VisualStudio.Web.CodeGeneration.Contracts 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore] One or more packages are incompatible with .NETCoreApp,Version=v2.0.
  [22:57:51][restore] Committing restore...
  [22:57:51][restore] Restore failed in 19,33 sec for C:\path\to\project\Server\Server.csproj.
  [22:57:51][restore] 
  [22:57:51][restore] Errors in C:\path\to\project\Server\Server.csproj
  [22:57:51][restore]     Package Microsoft.AspNetCore 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2). Package Microsoft.AspNetCore 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore]     Package Microsoft.AspNetCore.Mvc 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2). Package Microsoft.AspNetCore.Mvc 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore]     One or more packages are incompatible with .NETFramework,Version=v4.6.2.
  [22:57:51][restore]     Package Microsoft.AspNetCore 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2) / win7-x86. Package Microsoft.AspNetCore 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore]     Package Microsoft.AspNetCore.Mvc 2.0.0 is not compatible with net462 (.NETFramework,Version=v4.6.2) / win7-x86. Package Microsoft.AspNetCore.Mvc 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore] 
  [22:57:51][restore]     One or more packages are incompatible with .NETFramework,Version=v4.6.2 (win7-x86).
  [22:57:51][restore] NuGet Config files used:
  [22:57:51][restore] 
  [22:57:51][restore]     C:\Windows\system32\config\systemprofile\AppData\Roaming\NuGet\NuGet.Config
  [22:57:51][restore] Errors in C:\path\to\project\Server\Server.csproj
  [22:57:51][restore] 
  [22:57:51][restore]     Package Microsoft.Extensions.FileProviders.Physical 2.0.0 is not compatible with netcoreapp2.0 (.NETCoreApp,Version=v2.0). Package Microsoft.Extensions.FileProviders.Physical 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore] Feeds used:
  [22:57:51][restore]     https://api.nuget.org/v3/index.json
  [22:57:51][restore]     Package Microsoft.VisualStudio.Web.CodeGeneration.Contracts 2.0.0 is not compatible with netcoreapp2.0 (.NETCoreApp,Version=v2.0). Package Microsoft.VisualStudio.Web.CodeGeneration.Contracts 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)
  [22:57:51][restore]     One or more packages are incompatible with .NETCoreApp,Version=v2.0.
  [22:57:51][restore] 
  [22:57:51][restore] Installed:
  [22:57:51][restore]     151 package(s) to C:\path\to\project\Server\Server.csproj
  [22:57:51][restore] Process exited with code 1
  [22:57:51][restore] Process exited with code 1
  [22:57:51][Step 1/4] Step Nuget Restore (NuGet Installer) failed
  </code></pre>