Seeing a strange issue where on some systems the below code steps into the if statement (i.e. it returns true) while in other systems it returns false and steps into the else statement. What environmental conditions or framework version changes am I missing where this was changed? For example .net Fiddle returns true, but my own console apps return false.
DateTime time;
formatText = "";
if (DateTime.TryParse (DateTime.Now.ToString(formatText), CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out time))
{
// If TryParseExact Worked
Console.WriteLine ("True: " + time.ToString ());
}
else
{
// If TryParseExact Failed
Console.WriteLine ("Failed to Parse Date");
}
String representations of DateTime are culture specific.
Passing an empty string or null as the format parameter of the ToString overload of DateTime is the same as passing the standard format specifier "G" - from the remarks section of the DateTime.ToString Method (String) msdn page:
If format is null or an empty string, the general format specifier, 'G', is used.
The TryParse overload you are using attempts to parse the DateTime value using the date and time formats available in the IFormatProvider format parameter - InvariantCulture in your case - so when you use TryParse with InvariantCulture, unless your current culture's ShortDatePattern and LongTimePattern properties are the same as in InvariantCulture, the tryParse will fail.
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