title: How to get DayNames from language only in .NET
body: <p>Assume that I only have a country code (en, de, fr) and I need to display the weekdays in this language.
  I know about RegionInfo and CultureInfo - but I can't find a solution.
  If I create a country info from (for an example) "en" I have no DateTime info in it.
  It would also be OK to just take the first matching Region. For an example en-US for en or de-DE for de.</p>
  
  <p>I don't know if there are differences in DayNames but I know there are some for the months.
  de-DE Februar - de-AT Feber -- anyhow I don't care.
  Event if it may be "a bit different" (to see Februar instead of Feber) - it is still German.</p>
  
  <p>And that's what I want to achive - get en an write Monday - get de and write Montag...</p>
  
  <p>Is there a way to create a region just from a language code?</p>