CRM.Visitors/CRM.Visitors/CRM.Visitors.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Compile Remove="Managers\VisitorManager.cs" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\..\crm\CRM\CRM.publish.csproj" />
  </ItemGroup>

</Project>