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This is an extremely rare case in which in which DateTime parsing yields a wrong date. The XmlConvert methods are marked as deprecated, however these are still used by the XmlWriter/Reader classes.
Reproducing code in F#
let date1 = DateTime(634682436600000000L) // March 24 2012
let date2 = date1 |> XmlConvert.ToString |> XmlConvert.ToDateTime
date1 = date2 // false
I am using following C# program and cannot reproduce the issue. What culture are your running
public static void Main ()
var dt = new DateTime (634682436600000000L);
var s = XmlConvert.ToString (dt);
var dt2 = XmlConvert.ToDateTime (s);
Console.WriteLine (dt == dt2);
I'm running on "en-US". I can confirm that your C# code also reproduces this issue on my machine.
It works for me with en-US too but I am testing 3.6 only