How do I generate a hashcode from a byte array in C#?

Question

Say I have an object that stores a byte array and I want to be able to efficiently generate a hashcode for it. I\'ve used the cryptographic hash functions for this in the pa

Answer 1

private int? hashCode;

public override int GetHashCode()
{
    if (!hashCode.HasValue)
    {
        var hash = 0;
        for (var i = 0; i < bytes.Length; i++)
        {
            hash = (hash << 4) + bytes[i];
        }
        hashCode = hash;
    }
    return hashCode.Value;
}