using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

      int a = 1;

      int? b = a; 

​

      Console.WriteLine(b);

​

      List<int> temp = new List<int>{1};

      int? valueVariable = temp!=null && temp.Count>0 ? temp[0] : null ;

​

        // Working Snippet with int? casting

        //int? valueVariable = temp!=null && temp.Count > 0 ? (int?) temp[0] : null ;

      Console.WriteLine(valueVariable);

    }

}