String was not recognized as a valid parameter for DateTime.ParseExact

Question

I'm using this code:

var sec = "163516";
TimeSpan time = TimeSpan.FromSeconds(double.Parse(sec));
DateTime butikDatetime = DateTime.Today.Add(time);
string dateTime = butikDatetime.ToString("dd-MM-yy HH:mm:ss");
DateTime date = DateTime.ParseExact(dateTime, "dd-MM-yy HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);

But receive this error for ParseExact:

Additional information: String was not recognized as a valid DateTime.

Somebody have an idea what is wrong?

[Your code works, actually](https://dotnetfiddle.net/q0aNSe) Are you sure your current `fa-IR` culture does not use any `TimeSeparator` other than `:` character? — Soner Gönül, Oct 24 '15 at 09:42

score 0 · Accepted Answer · edited Oct 24 '15 at 09:51

You are converting the butikDateTime to dateTime object without culture (framework will use the current thread culture) and later reconverting the using Invariant culture. Can you use Invariant culture while converting butikDateTime to string

var sec = "163516";
TimeSpan time = TimeSpan.FromSeconds(double.Parse(sec));
DateTime butikDatetime = DateTime.Today.Add(time);
string dateTime = butikDatetime.ToString("dd-MM-yy HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);
DateTime date = DateTime.ParseExact(dateTime, "dd-MM-yy HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);

Updated line 3 as :

string dateTime = butikDatetime.ToString("dd-MM-yy HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);

can you try with setting the 'System.Threading.Thread.CurrentThread.CurrentCulture' in both conversion? — user1672994, Oct 24 '15 at 12:22

String was not recognized as a valid parameter for DateTime.ParseExact

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