namespace ConsoleApp17 {
    class Program {
        static void Main(string[] args) {

            //迴圈列印陣列
            int[] aa = new int[] {1,2,3,4,5,6,7,8,9,10 };
            //A方法
            //末尾會跟著一個逗號
            foreach (int a in aa) {
                Console.Write(a+",");
            }
            Console.WriteLine();
            //B方法
            //String.Join("分割符號"，需要列印的陣列)
            String s = String.Join(",",aa);
            Console.WriteLine(s);


            Console.Read();

        }
    }
}
 

列印如下: