public int GetHashCode(object x)
{
byte[] obj = (byte[])x;
if (obj == null || obj.Length == 0)
return 0;
var hashCode = 0;
for (var i = 0; i < obj.Length; i++)
// Rotate by 3 bits and XOR the new value.
hashCode = (hashCode << 3) | (hashCode >> (29)) ^ obj[i];
return hashCode;
}