FSO.Files.Endian.SwapUInt64 C# (CSharp) Method

        public static ulong SwapUInt64(ulong v)
        {
            return (ulong)(((SwapUInt32((uint)v) & 0xffffffffL) << 0x20) |
                            (SwapUInt32((uint)(v >> 0x20)) & 0xffffffffL));
        }