using System;

public class Program

{

    public static void Main()

    {

        int foo = 7;

        string bar = "7";

        int result = foo + bar;

        //int result = foo + Int32.Parse(bar);

        Console.WriteLine(result);

​

        string result2 = foo + bar; 

        Console.WriteLine(result2);     

        var result3 = foo + bar;

        Console.WriteLine(result3);

​

        var seven = 7;

        //int twentyone = result3 + seven;

        var fourteen = "14";

        Console.WriteLine(fourteen + seven);

        Console.WriteLine(result3 + seven);

        Console.WriteLine(14 + seven);

​

        // the ints above are being implicitly cast to strings

        // we can explicitly cast int's to strings as well:

        var mystring = seven.ToString();

    }

}