Generic Overload Resolution 2 | C# Online Compiler

Generic Overload Resolution 2 by RichardD

using System;
using System.Collections.Generic;
using System.Linq;
					
public class Program
{
	public static void Main()
	{
		Bar();
	}
	
	static void Foo<T>(IEnumerable<T> value) => Console.WriteLine($"Foo<{typeof(T)}>(IEnumerable<{typeof(T)}>)");
	static void Foo<T>(params T[] value) => Console.WriteLine($"Foo<{typeof(T)}>(params {typeof(T)}[])");
	
	static void Bar()
	{
		Foo(42); // Foo<int>(params) - Correct
		Foo(Enumerable.Range(1, 42)); // Foo<int>(IEnumerable) - Correct
		Foo(new[] { 1, 2, 3 }); // Foo<int>(params) - Correct
		Foo(new List<int> { 1, 2, 3 }); // Foo<IEnumerable<int>>(params) - *** INCORRECT ***
	}
}

 
using System;
using System.Collections.Generic;
using System.Linq;
                    
public class Program
{
    public static void Main()
    {
        Bar();
    }
    
    static void Foo<T>(IEnumerable<T> value) => Console.WriteLine($"Foo<{typeof(T)}>(IEnumerable<{typeof(T)}>)");
    static void Foo<T>(params T[] value) => Console.WriteLine($"Foo<{typeof(T)}>(params {typeof(T)}[])");
    
    static void Bar()
    {
        Foo(42); // Foo<int>(params) - Correct
        Foo(Enumerable.Range(1, 42)); // Foo<int>(IEnumerable) - Correct
        Foo(new[] { 1, 2, 3 }); // Foo<int>(params) - Correct
        Foo(new List<int> { 1, 2, 3 }); // Foo<IEnumerable<int>>(params) - *** INCORRECT ***
    }
}

                 Decimal value                 UInt16
              ----------------                 ------
                           123                    123
                       123.000                    123
                       123.999                    123
                     65535.999                  65535
             OverflowException                  65536
                     32767.999                  32767
                         32768                  32768
                        -0.999                      0
             OverflowException                     -1
             OverflowException             -32768.999
             OverflowException                 -32769

Last Run:	2:33:21 am
Compile:	0.382s
Execute:	0.088s
Memory:	425.12kb
CPU:	0.031s

View IL Code