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copied!<p>Jeff Atwood had a few things to say about this issue in <a href="http://blog.codinghorror.com/determining-build-date-the-hard-way/" rel="noreferrer">Determining Build Date the hard way</a>.</p> <p>The most reliable method turns out to be retrieving the linker timestamp from the <a href="https://web.archive.org/web/20120106051754/http://support.microsoft.com/kb/65122" rel="noreferrer">PE header</a> embedded in the executable file -- some C# code (by Joe Spivey) for that from the comments to Jeff's article:</p> <pre><code>public static DateTime GetLinkerTime(this Assembly assembly, TimeZoneInfo target = null) { var filePath = assembly.Location; const int c_PeHeaderOffset = 60; const int c_LinkerTimestampOffset = 8; var buffer = new byte[2048]; using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read)) stream.Read(buffer, 0, 2048); var offset = BitConverter.ToInt32(buffer, c_PeHeaderOffset); var secondsSince1970 = BitConverter.ToInt32(buffer, offset + c_LinkerTimestampOffset); var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc); var linkTimeUtc = epoch.AddSeconds(secondsSince1970); var tz = target ?? TimeZoneInfo.Local; var localTime = TimeZoneInfo.ConvertTimeFromUtc(linkTimeUtc, tz); return localTime; } </code></pre> <p>Usage example:</p> <pre><code>var linkTimeLocal = Assembly.GetExecutingAssembly().GetLinkerTime(); </code></pre> <p>UPDATE: The method was working for .Net Core 1.0, but <strong>stopped working after .Net Core 1.1</strong> release(gives random years in 1900-2020 range) </p>

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