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Filetime to Date in C#

I've got a problem converting Filetime to Date in C#

I'm working with the Win 32 API and with the FtpFindFirstFile which return me ftCreationTime in FileData. I use this type as FileData:
      public class FileData
      {
            public long      fileAttributes = 0;
            public FILETIME ftCreationTime;
            public FILETIME      ftLastAccessTime;
            public FILETIME      ftLastWriteTime;
            public long      nFileSizeHigh = 0;
            public long      nFileSizeLow = 0;
            public long      dwReserved0 = 0;
            public long      dwReserved1 = 0;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst=256)]
            public String      fileName = null;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst=14)]
            public String      alternateFileName = null;
      }

This works (I think) but now I can't or I don't know how to convert this FILETIME to long (because when it would be long I could use DateTime.FromFileTime())

I already tried to use long or ulong instead of FILETIME but then it returns 0.

Thank you for your help

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lbertacco

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SiraX

ASKER

Exactly what I need =)

Thank you very much for the quick and right answer