PeNet.WINTRUST_FILE_INFO.WINTRUST_FILE_INFO C# (CSharp) Метод

        public WINTRUST_FILE_INFO(string fileName, Guid subject)
        {
            cbStruct = (uint) Marshal.SizeOf(typeof(WINTRUST_FILE_INFO));
            pcwszFilePath = fileName;

            if (subject != Guid.Empty)
            {
                pgKnownSubject = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(Guid)));
                Marshal.StructureToPtr(subject, pgKnownSubject, true);
            }
            else
            {
                pgKnownSubject = IntPtr.Zero;
            }
            hFile = IntPtr.Zero;
        }