Hashing multiple byte[]'s together into a single hash with C#?

Question

I have three fields: string Title, byte[] Body, and byte[] Data, from which I want to calculate a single hash as a check to be sure th

Answer 1

you can create a Hash over the Hash values.

MD5 md5 =  System.Security.Cryptography.MD5.Create();
byte[] totalHash= md5.ComputeHash(md5.ComputeHash(part1).Concat(md5t.computeHash(part2)));

doesnt create a copy of the byte array but hashes a concatenation of the hashes.