How to compare two files based on datetime?

Don't call ToString() on the DateTime values returned by GetLastWriteTime(). Do this instead:

DateTime ftime = File.GetLastWriteTime(fileName);
DateTime ftime2 = File.GetLastWriteTime(fileName2);

Then you can just compare ftime and ftime2:

if (ftime == ftime2)
{
   // Files were created or modified at the same time
}

Well, how about doing

ftime == ftime2

? No need for the ToString though, better just compare DateTimes as-is.

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