WPF converters: where does the culture come from

Question

I've created a WPF converter class:

public class DoubleConverter : IValueConverter
{
    public object Convert(object value, Type TargetType, object parameter, CultureInfo culture)
    {
        //blah blah
    }
}

I wonder who sets the culture parameter that is passed. I would expect it to be the same as the current windows settings, but it appears to be different.

Anyone?

Answer 1

This page describes a bug (feature?) of WPF where culture will always be en-US unless you take action to specify otherwise and how to fix it.

Answer 2

Actually, using the technique described on that page is a bad idea -- it doesn't take into account any customisations that the user has made to their formatting settings in the Control Panel.

Instead, just ignore the culture parameter passed in to the converter entirely; if you need to pass a culture on to something else, use CultureInfo.CurrentCulture. (Since this is the default for Parse and ToString, you usually don't need to pass it on anyway.)