private void WriteMagicAndSize(long Position, int Size)
{
const int DecMagic = 0x18029a7f;
const int Key = 0x49621806;
int EncryptedSize = EndianSwap.Swap32(Size ^ Key);
Memory.WriteInt32(Position + 0, DecMagic);
Memory.WriteInt32(Position + 4, EncryptedSize);
}