c# - How to convert a Unix timestamp to DateTime and vice versa? -

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there example code, starts talking millisecond / nanosecond problems.

the same question on msdn, seconds since unix epoch in c#.

this i've got far:

public double createdepoch {     {     datetime epoch = new datetime(1970, 1, 1, 0, 0, 0, 0).tolocaltime();     timespan span = (this.created.tolocaltime() - epoch);     return span.totalseconds;   }   set   {     datetime epoch = new datetime(1970, 1, 1, 0, 0, 0, 0).tolocaltime();     this.created = epoch.addseconds(value);   } }

here's need:

public static datetime unixtimestamptodatetime( double unixtimestamp ) {     // unix timestamp seconds past epoch     system.datetime dtdatetime = new datetime(1970,1,1,0,0,0,0,system.datetimekind.utc);     dtdatetime = dtdatetime.addseconds( unixtimestamp ).tolocaltime();     return dtdatetime; }

or, java (which different because timestamp in milliseconds, not seconds):

public static datetime javatimestamptodatetime( double javatimestamp ) {     // java timestamp milliseconds past epoch     system.datetime dtdatetime = new datetime(1970,1,1,0,0,0,0,system.datetimekind.utc);     dtdatetime = dtdatetime.addmilliseconds( javatimestamp ).tolocaltime();     return dtdatetime; }

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