using System; class MainClass { public static void Main() { string myString4 = String.Concat("A, ", "B"); Console.WriteLine("String.Concat(\"A, \", \"B\") = "+ myString4); string myString5 = String.Concat("A, ", "B, ", "and countrymen"); Console.WriteLine("String.Concat(\"A, \", \"B, \", " + "\"and countrymen\") = " + myString5); } }