a test from wiziq.com - first question

cs_online_test_01_params_test.cs

/* Question 1 of a C# Test
   What will be outputs
   0
   10
   60
   
   Possibly from: wiziq.com
*/
using System;
using System.Collections.Generic;

class Solution {
  public static void Add(int a, int b) {
    Console.WriteLine(a + b);
  }
  public static void Add(params int[] val)
  {
    int sum = 0;
    foreach (var item in val)
      sum += item;
    Console.WriteLine(sum);
  }

  static void Main(string[] args) {
    Add();
    Add(4, 6);
    Add(10, 20, 30);
  }
}