public class Program

{

    public static void Main()

    {

        string s1 = "A string is more ";

        string s2 = "than the sum of its chars.";

​

        // Concatenate s1 and s2. This actually creates a new 

        // string object and stores it in s1, releasing the 

        // reference to the original object.

        s1 += s2;

​

        System.Console.WriteLine(s1);

        // Output: A string is more than the sum of its chars.

    }

}