title: .NET Core .csproj missing file path of .cs files in vs studio 2019
body: <p>where are files path location in .NET Core .csproj file? I edit project and open it and still not a single cs class file path.</p>
  
  <p>This is one of the project example. This project have more than 1000 cs files in advance tree in Solution Explorer.</p>
  
  <pre><code>&lt;Project Sdk="Microsoft.NET.Sdk"&gt;
  
    &lt;PropertyGroup&gt;
      &lt;TargetFramework&gt;netcoreapp2.2&lt;/TargetFramework&gt;
      &lt;!--&lt;TargetFramework&gt;net461&lt;/TargetFramework&gt;--&gt;
      &lt;RootNamespace&gt;Microsoft.Web.Api.R1.BusinessLogic&lt;/RootNamespace&gt;
      &lt;AssemblyName&gt;Microsoft.Web.Api.R1.BusinessLogic&lt;/AssemblyName&gt;
    &lt;/PropertyGroup&gt;
  
    &lt;ItemGroup&gt;
  
      &lt;Folder Include="GraphQL\Microsoft\Microsoft\R1\" /&gt;
      &lt;Folder Include="MicrosoftHandlers\R1" /&gt;
    &lt;/ItemGroup&gt;
  
    &lt;ItemGroup&gt;
      &lt;PackageReference Include="Microsoft.Containers" Version="0.25.0" /&gt;       
      &lt;PackageReference Include="Microsoft.AccessTokenValidation" Version="2.3.0" /&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.2.0" /&gt;
      &lt;PackageReference Include="Microsoft.IdentityModel.Tokens" Version="5.6.0" /&gt;
    &lt;/ItemGroup&gt;
  
    &lt;ItemGroup&gt;
      &lt;ProjectReference Include="..\Microsoft.Web.Api.R1\Microsoft.Web.Api.R1.csproj" /&gt;
    &lt;/ItemGroup&gt;
  
  &lt;/Project&gt;
  </code></pre>