c# - DateTime Unspecified Kind -

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on msdn defined unspecified kind as:

kind

so if kind unspecified datetime utc, on same page (given example):

class sample  {     public static void main()      {       datetime savenow = datetime.now;       mydt = datetime.specifykind(savenow, datetimekind.unspecified);       display("unspecified: .....", mydt);     }      public static string datepatt = @"m/d/yyyy hh:mm:ss tt";      public static void display(string title, datetime inputdt)     {       datetime dispdt = inputdt;       string dtstring;        dtstring = dispdt.tostring(datepatt);       console.writeline("{0} {1}, kind = {2}", title, dtstring, dispdt.kind);        dispdt = inputdt.tolocaltime();       dtstring = dispdt.tostring(datepatt);       console.writeline("  tolocaltime:     {0}, kind = {1}", dtstring, dispdt.kind);        dispdt = inputdt.touniversaltime();       dtstring = dispdt.tostring(datepatt);       console.writeline("  touniversaltime: {0}, kind = {1}", dtstring, dispdt.kind);       console.writeline();     }   } }

giving output as:

unspecified: ..... 5/6/2005 02:34:42 pm, kind = unspecified

tolocaltime: 5/6/2005 07:34:42 am, kind = local

touniversaltime: 5/6/2005 09:34:42 pm, kind = utc

so, issue have is, if unspecified utc why utc utc conversion change datetime object value?

no, unspecified , utc different - page you're quoting from tolocaltime. point if call tolocaltime using "unspecified" datetime, value treated as if in utc.

likewise if call touniversaltime using "unspecified" datetime, value treated as if in system local time zone.

frankly sort of thing why i dislike datetime rather lot. if you, i'd use noda time instead, separates concepts out different types entirely, removing lot of confusion. (there more types know about, each 1 represents single concept.) i'm biased though...


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