title: .csproj bug in Asp .NET Core MVC
body: <p>I have wanted to create new table in my database (SQLite), so I created new Model and used it in ApplicationDbContext class like this:</p>
  
  <pre><code>   public DbSet&lt;AppUser&gt; AppUsers { get; set; }
     public DbSet&lt;Report&gt; Reports { get; set; }
  </code></pre>
  
  <p>Then executed the command later:
  <strong>dotnet ef migrations add Report</strong>
  I can see migration file. 
  In Startup.cs file I have:</p>
  
  <pre><code> services.AddDbContext&lt;ApplicationDbContext&gt;(options =&gt; options.UseSqlServer(connectionString));
   services.AddDbContext&lt;AppIdentityDbContext&gt;(options =&gt; options.UseSqlServer(connectionString));
  </code></pre>
  
  <p>In EFRepository.cs:</p>
  
  <pre><code> public IQueryable&lt;AppUser&gt; AppUsers
              =&gt; ctx.AppUsers;
          public IQueryable&lt;Report&gt; Reports =&gt; ctx.Reports;
  </code></pre>
  
  <p>After this somehow suddenly I received many errors connected with this file ( <strong>.csproj</strong>):</p>
  
  <pre><code> &lt;Project Sdk="Microsoft.NET.Sdk.Web"&gt;
  
    &lt;PropertyGroup&gt;
      &lt;TargetFramework&gt;netcoreapp3.0&lt;/TargetFramework&gt;
      &lt;AssemblyName&gt;Mushrooms&lt;/AssemblyName&gt;
      &lt;RootNamespace&gt;Mushrooms&lt;/RootNamespace&gt;
    &lt;/PropertyGroup&gt;
  
    &lt;ItemGroup&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.0.0" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.0.0" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.0.0"&gt;
        &lt;IncludeAssets&gt;runtime; build; native; contentfiles; analyzers; buildtransitive&lt;/IncludeAssets&gt;
        &lt;PrivateAssets&gt;all&lt;/PrivateAssets&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.0.0" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.0.0"&gt;
        &lt;PrivateAssets&gt;all&lt;/PrivateAssets&gt;
        &lt;IncludeAssets&gt;runtime; build; native; contentfiles; analyzers; buildtransitive&lt;/IncludeAssets&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.0.0" /&gt;
      &lt;PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0" /&gt;
      &lt;PackageReference Include="Newtonsoft.Json" Version="12.0.2" /&gt;
    &lt;/ItemGroup&gt;
  
  &lt;/Project&gt;
  </code></pre>
  
  <p>I checked dotnet --info command, but I can't see incompatibility.
  Three of the errors:</p>
  
  <blockquote>
    <p>Invalid markup declaration '&lt;'</p>
    
    <p>Invalid markup declaration '
    
    <p>Invalid token "" at root level of document.</p>
  </blockquote>
  
  <p>and many more in every line of this file.</p>
  
  <p>This errors have occured when system was starting up. 
  I am using Asp .NET Core MVC 3.0.0.
  Before this everything was working fine, any suggestions?</p>