FlatBuffers.ByteBuffer.PutUlong C# (CSharp) Method

        public unsafe void PutUlong(int offset, ulong value)
        {
            AssertOffsetAndLength(offset, sizeof(ulong));
            fixed (byte* ptr = _buffer)
            {
                *(ulong*)(ptr + offset) = BitConverter.IsLittleEndian
                    ? value
                    : ReverseBytes(value);
            }
        }

 public void PutUlong(ulong x)
 {
     _bb.PutUlong(_space -= sizeof(ulong), x);
 }