public unsafe void ULongRead() { byte[] data; using (MemoryStream ms = new MemoryStream()) { using (BinaryWriter writer = new BinaryWriter(ms)) for (int count = 0; count < 256; count++) { writer.Write((ulong)count); } data = ms.ToArray(); } fixed(byte *pData = data) { UnsafeBinaryMemoryReader reader = new UnsafeBinaryMemoryReader(pData); for (int count = 0; count < 256; count++) { Assert.AreEqual(reader.ReadUInt64(), (ulong)count, "UnsafeBinaryMemoryReader ULong incompatible to BinaryWriter."); } } }