covariant-array.cs

using System.Collections.Generic;

interface IFruit {
  string Name {get;}
}

class Banana : IFruit {
  public string Name => "Banana";
}

class Test {
  public static void Main ()
  {
    var bananas = new Banana[]{
      new Banana(),
      new Banana(),
    };
    IList<Banana> b = bananas;
  }
}