Problem with ClaimsResponse, if users's language + country doesn't make a valid culture

[AkosLukacs]

Tried to authenticate with google, and got this exception:
Culture is not supported. Parameter name: name en-HU is an invalid culture identifier.
Stacktrace:
System.Globalization.CultureNotFoundException: Culture is not supported. Parameter name: name en-HU is an invalid culture identifier. at System.Globalization.CultureInfo.GetCultureInfo(String name) at DotNetOpenAuth.OpenId.Extensions.SimpleRegistration.ClaimsResponse.get_Culture()

The exceptions (and the as well source ) tell that you are trying to concatenate language + country.

I think it's possible that someone is living in a foreign country changes the country to the place where (s)he actually lives, but leaves the original language. That could create all kinds of illegal language-country combinations.

[AArnott]

Thanks for the pull request. Closing this issue as it is duplicate now.