.netcultureinforegional-settings

CultureInfo.GetCultures returns different DateTimeSettings for specific culture than when using GetCultureInfo by Name or LCID

First I edit my regional settings and change the dateformat for the locale nl-BE to use yyyy-MM-dd. enter image description here

Then in my ASP.NET code (Standard .Net 4.6.1 on a Windows 10 machine) I run this code:

CultureInfo.GetCultures(CultureTypes.InstalledWin32Cultures)

The result of this is a list with cultures. When I specifically look at the locale that I changed (nl-BE) I get the following result:

getcultures returns the modified locale settings

This is the same as what I specified in my windows settings, pictured above, which seems fine.

If I, in the same application, search for this specific locale either by name or LCID, this customized setting is not displayed:

enter image description here

Can someone explain to me why there is a difference between the two?

Is there perhaps another key I can use to make sure I get the same result?

Solution

  • The constructor of the CultureInfo class has a Boolean argument useUserOverride which specifies whether to apply the (regional) settings you set for your user profile (which go to HKEY_CURRENT_USER\Control Panel\International in the registry). 

    public CultureInfo(int culture) : this(culture, true) {}

public CultureInfo(int culture, bool useUserOverride) 
{
   // ...
}

    useUserOverride:
    A Boolean that denotes whether to use the user-selected culture settings (true) or the default culture settings (false).


    CultureInfo.GetCultures(CultureTypes types) (via CultureData.GetCultures(CultureTypes types)) creates instances using true (via the constructors default value). 

    cultures[i] = new CultureInfo(cultureNames[i]);

    So these cultures have your changes.


    GetCultureInfo(int culture) instantiates a CultureInfo (using GetCurrentInfoHelper) passing false to userUserOverride:

    retval = new CultureInfo(lcid, false);

    This results in a returned CultureInfo without your changes.