title: Azure deployment fails with build errors
body: <p>I have been trying to deploy my web application to azure for two days now. I had finished programming the application and its working properly locally, when i pushed to application to github, and I'm using my student starter plan to deploy it. The application starts deploying then it fails with errors. The errors are below</p>
  
  <pre><code>/usr/share/dotnet/sdk/3.0.100/Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3245: Could not resolve this reference. Could not locate the assembly "Microsoft.Extensions.Identity.Stores". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors. [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Administration/SchoolRole.cs(1,17): error CS0234: The type or namespace name 'AspNetCore' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Administration/SchoolUser.cs(1,17): error CS0234: The type or namespace name 'AspNetCore' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Tenancy/TenancyRole.cs(1,17): error CS0234: The type or namespace name 'AspNetCore' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Tenancy/TenancyUser.cs(2,17): error CS0234: The type or namespace name 'AspNetCore' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Administration/SchoolRole.cs(5,31): error CS0246: The type or namespace name 'IdentityRole&lt;&gt;' could not be found (are you missing a using directive or an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Administration/SchoolUser.cs(7,31): error CS0246: The type or namespace name 'IdentityUser' could not be found (are you missing a using directive or an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Tenancy/TenancyRole.cs(5,32): error CS0246: The type or namespace name 'IdentityRole&lt;&gt;' could not be found (are you missing a using directive or an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
  Tenancy/TenancyUser.cs(7,32): error CS0246: The type or namespace name 'IdentityUser' could not be found (are you missing a using directive or an assembly reference?) [/home/vsts/work/1/s/SchoolManager.Models/SchoolManager.Models.csproj]
      1 Warning(s)
      8 Error(s)
  </code></pre>
  
  <p>I had even changed the host now to <code>Azure DevOps</code> but it still show me the same thing. This has pushed me to rewrite the application from start. It runs locally okay but when i publish it, it fails.</p>