ArrayList.Add
using System; using System.Collections; using System.Collections.Generic; using System.Text; class Program { static void Main(string[] args) { ArrayList baseballTeams = new ArrayList(); baseballTeams.Add("S"); baseballTeams.Add("r"); baseballTeams.Add("F"); string[] myStringArray = new string[2]; myStringArray[0] = "G"; myStringArray[1] = "L"; baseballTeams.AddRange(myStringArray); foreach (string item in baseballTeams) { Console.Write(item + "\n"); } } }