.net - Unity configuration file class mapping with interfaces with generics

Question

I'm having this issue and after googled and readed almost all the documentation about it and search for the same question here, I'm not able to solve it, I really need help.

So I've just made a short piece of code so any of you can reproduce easily:

using Microsoft.Practices.Unity.Configuration;
using Unity;

namespace ConsoleApp1
{
    public class Dog { public Dog() { } }
    public class Cat { public Cat() { } }
    public interface IVet<T1, T2>{}
    public interface IHospital<T> { }

    public class Veterinarian : IVet<Dog, Cat> { public Veterinarian() { } }

    public class VeterinaryHospital : IHospital<IVet<Dog, Cat>> { public VeterinaryHospital() { } }

    class Program
    {
        static void Main(string[] args)
        {
            UnityContainer Container;
            //New container
            Container = new UnityContainer();
            Container.AddExtension(new Diagnostic());
            //Loading configuration
            Container.LoadConfiguration();

            var myVet = Container.Resolve<IVet<Dog, Cat>>(); //Ok
            var myHospital = Container.Resolve<IHospital<IVet<Dog, Cat>>>(); //Throws resolve exception
        }
    }
}

And the app.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration" />
  </configSections>
  <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">    
    <alias alias="DogEntity" type="ConsoleApp1.Dog, ConsoleApp1" />
    <alias alias="CatEntity" type="ConsoleApp1.Cat, ConsoleApp1" />
    <alias alias="IHospital" type="ConsoleApp1.IHospital`1, ConsoleApp1" />
    <alias alias="IVet" type="ConsoleApp1.IVet`2, ConsoleApp1" />
    <alias alias="VeterinaryHospital" type="ConsoleApp1.VeterinaryHospital, ConsoleApp1" />
    <alias alias="Veterinarian" type="ConsoleApp1.Veterinarian, ConsoleApp1" />
    <containers>
      <container>
        
        <register type="IVet[DogEntity,CatEntity]" mapTo="Veterinarian">
          <lifetime type="ContainerControlledLifetimeManager"/>
        </register>
        <register type="IHospital[Veterinarian]" mapTo="VeterinaryHospital">
          <lifetime type="ContainerControlledLifetimeManager"/>
        </register>
        <!-- This option doesn't work either -->
        <!--<register type="IHospital[IVet[DogEntity,CatEntity]]" mapTo="VeterinaryHospital">
          <lifetime type="ContainerControlledLifetimeManager"/>
        </register>-->

      </container>
    </containers>
  </unity>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
    </startup>
</configuration>

So, the problem is that I'm not able to get my "Hospital" resolved, I'm getting always a

Unity.ResolutionFailedException: 'The current type, ConsoleApp1.IHospital`1[ConsoleApp1.IVet`2[ConsoleApp1.Dog,ConsoleApp1.Cat]], is an interface and cannot be constructed. Are you missing a type mapping?

Any suggestions please?

Thank you in advance!

Answer 1

等待大神答复