using System;

using System.Collections.Generic;

using System.Linq;

​

public interface IFoo

{

}

​

public interface IFooBar<TFoo>

  where TFoo : IFoo

{

}

​

public interface IFooRepository<TFoo>

  where TFoo : IFoo

{

}

​

public interface IFooBarRepository<TFooBar, TFoo>

  where TFoo : IFoo

  where TFooBar : IFooBar<TFoo>

{

      TFooBar DoWork(TFooBar fooBar);

}

​

public abstract class FooRepositoryBase<TFoo> : IFooRepository<TFoo>

  where TFoo : IFoo

{

  protected IEnumerable<IFooBarRepository<IFooBar<TFoo>, TFoo>> FooBarRepositories { get; set; }

  public FooRepositoryBase(params IFooBarRepository<IFooBar<TFoo>, TFoo>[] fooBarRepositories)

  {

    FooBarRepositories = fooBarRepositories.ToList();

  }

}

​

public class MyFoo : IFoo { }

​

public class MyFooBar : IFooBar<MyFoo> { }

​

public class MyFooBarRepository : IFooBarRepository<MyFooBar, MyFoo>

{

    public MyFooBar DoWork(MyFooBar fooBar)

    {

        throw new NotImplementedException();

    }

}

​

public class MyFooRepository : FooRepositoryBase<MyFoo>

{

    public MyFooRepository(params IFooBarRepository<IFooBar<MyFoo>, MyFoo>[] fooBarRepositories)

        : base(fooBarRepositories)

    { }

}

​

​

public class Program

{

    public static void Main()

    {

        var myFooBarRepository1 = new MyFooBarRepository();

        var myFooBarRepository2 = new MyFooBarRepository();

        // Compilation error (line 65, col 26): The best overloaded method match for 'MyFooRepository.MyFooRepository(params IFooBarRepository<IFooBar<MyFoo>,MyFoo>[])' has some invalid arguments

        // Compilation error (line 65, col 46): Argument 1: cannot convert from 'MyFooBarRepository' to 'IFooBarRepository<IFooBar<MyFoo>,MyFoo>'

        // Compilation error (line 65, col 67): Argument 2: cannot convert from 'MyFooBarRepository' to 'IFooBarRepository<IFooBar<MyFoo>,MyFoo>'

        //var myFooRepository1 = new MyFooRepository(myFooBarRepository1, myFooBarRepository2);

        var myFooRepository2 = new MyFooRepository(

            (IFooBarRepository<IFooBar<MyFoo>, MyFoo>)myFooBarRepository1, 

            (IFooBarRepository<IFooBar<MyFoo>, MyFoo>)myFooBarRepository2);

    }

}

​