C Console Foundation listless thangreater than Initialization

Code 1.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
  class Program
  {
    static void Main(string[] args)
    {
      List<int> list1 = new List<int> { 1, 2, 3, 4, 5, };
    }
  }
}

Code 2.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
  class Program
  {
    static void Main(string[] args)
    {
      List<int> list1 = new List<int>();
      list1.Add(1);
      list1.Add(2);
      list1.Add(3);
      list1.Add(4);
      list1.Add(5);
    }
  }
}