using System;

public class Program

{

    public static void Main()

    {

        string[] strArray = {"111","222","3333"};

​

        // 1 - Method Signature: string Join (string separator, string[] value, int startIndex, int count);

​

        Console.WriteLine(String.Join("|", strArray, 0, 2));

        Console.WriteLine(String.Join("/", strArray, 1, 2));

​

        Console.WriteLine("\n\n-------------------Separator---------------------\n\n");

        // 2 - Method Signature: string Join (string separator, params string[] value);

​

        Console.WriteLine(String.Join("-", strArray));

​

    }

}