Compare Array String using C#.net

 foreach (string com in com2 )

            {

            if (!com1.Contains(com))

            {

                MessageBox.Show(com);

            }

            }

 string[] com1 = { "COM6", "COM7" };



                string[] com2 = { "COM6", "COM7", "COM8" };



                for (int i = 0; i < com1.Length; i++)

                {

                    for (int j = 0; j < com2.Length; j++)

                    {

                        if (com1.ToString() == com2[j].ToString())

                        { 

                          // Do yours code

                        }

                    }

                }