using System;

using System.Collections.Generic;

​

// Question: If I use 'var', when the actual type is assigned?

// From the following examples, it's evident that, C# determines the type at runtime also

public class Program

{

    public static void Main()

    {       

        List<object> objList = new List<object>();

        objList.Add("India");

        objList.Add(2);

        // compile time type differs from runtime type

        foreach(var obj in objList)

        {

            Console.WriteLine(obj.GetType());

        }

        //System.String

        //System.Int32

        var sum = 0;

        for(var c = 0; c < objList.Count; c++)

        {

            if(objList[c] is Int32)

                sum += (int)objList[c] * (int)objList[c];

        }

        Console.WriteLine("Sum = {0}", sum);

        var s = objList[0]; //"";

        s = 2;

        Console.WriteLine(s.GetType());

    }

}