checking sequence of numbers through byte array in c#

Actually i need to check the sequence of elements in an byte array in c#
where here "d" and "q" are character arrays.

here the below 2 lines are converting it into byte[]
iam getting error at    "if((item)==p.Contains(Convert.ToInt32(item)+1))"
byte[] p = Encoding.UTF8.GetBytes(d);
            byte[] r = Encoding.UTF8.GetBytes(q);
         
            foreach (var item in p)
            {
                if((item)==p.Contains(Convert.ToInt32(item)+1))
                {
                    count1 += 1;
                }

could you please help the error is byte[] doesnot contain 'contains' .