using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Bar();

    }

    public static void Foo<T>(T value) { Console.WriteLine("Foo a single value"); }

    public static void Foo<T>(IEnumerable<T> values) { Console.WriteLine("Foo multiple values"); }

​

    public static void Bar()

    {

        Foo(42); // Calls Foo(T) - Correct

        Foo(Enumerable.Range(1, 42)); // Calls Foo(IEnumerable) - Correct

​

        Foo(new[] { 1, 2, 3 }); // Calls Foo(T) - *** INCORRECT ***

        Foo(new List<int> { 1, 2, 3 }); // Calls Foo(T) - *** INCORRECT ***

​

        Foo((new[] { 1, 2, 3 }).AsEnumerable()); // Calls Foo(IEnumerable) - Correct

        Foo((new List<int> { 1, 2, 3 }).AsEnumerable()); // Calls Foo(IEnumerable) - Correct

    }

}