C # error1: the name "DateTimeStyles" does not exist in the current context. error2: Type or namespace name 'CultureInfo' not found

Question

Hi, I searched Google best, but could not repair these errors:

The name 'DateTimeStyles' does not exist in the current context

...

The type or namespace name 'CultureInfo' could not be found (are you missing a using directive or an assembly reference?)

.. could you help me if I missed something .. Here is my code ..

 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Globalization; using System.Security.Permissions; using System.Threading; namespace ConsoleApplication21 { class Program { static void Main(string[] args) { string[] formats = {"M/d/yyyy h:mm:ss tt", "M/d/yyyy h:mm tt", "MM/dd/yyyy hh:mm:ss", "M/d/yyyy h:mm:ss", "M/d/yyyy hh:mm tt", "M/d/yyyy hh tt", "M/d/yyyy h:mm", "M/d/yyyy h:mm", "MM/dd/yyyy hh:mm", "M/dd/yyyy hh:mm"}; string[] dateStrings = {"5/1/2009 6:32 PM", "05/01/2009 6:32:05 PM", "5/1/2009 6:32:00", "05/01/2009 06:32", "05/01/2009 06:32:00 PM", "05/01/2009 06:32:00"}; DateTime dateValue; foreach (string dateString in dateStrings) { if (DateTime.TryParseExact(dateString, formats, new CultureInfo("en-US"), DateTimeStyles.None, out dateValue)) Console.WriteLine("Converted '{0}' to {1}.", dateString, dateValue); else Console.WriteLine("Unable to convert '{0}' to a date.", dateString); } } } } 

I am using visual studio 2005.

Answer 1

It looks like your use statements are ok. There must be a link missing. Both types mentioned in the error message live in mscorlib.dll .

I believe the C # compiler always refers to mscorlib unless you ask it not to use it using the /nostdlib command line /nostdlib .

How do you compile your program? If you are using Visual Studio, check the project settings for the option “Do not use stdlib” or something like that (another answer explains where to find this option). If you use a command line compiler, make sure that you do not pass the /nostdlib .

Answer 2

It’s strange. Make sure your project is referencing mscorlib.dll :

Right-click on the project, select "Properties", select "Assembly", then "Advanced ..."; make sure the option "Do not reference mscorlib.dll" is disabled.

Answer 3

Hm. Both DataTimeStyles and CultureInfo are in the DataTimeStyles namespace, so

 using System.Globalization; 

Should be enough. What version of .NET are you using?