没有办法为应用程序中的所有线程设置区域性，但是，如果您正在应用程序中创建线程，则可以如上所述自行为每个线程设置区域性
要将区域性设置为主应用程序，请使用以下代码段：

Dim newCulture As CultureInfo = new CultureInfo("fr-FR")
CurrentThread.CurrentCulture = newCulture

尝试把

<UICulture>en-US</UICulture>

.在您的csproj文件。

好吧，这就是我用来确保我所有的应用程序都是在一个en-US文化。

CultureInfo.DefaultThreadCurrentCulture = new CultureInfo("en-US");
CultureInfo.DefaultThreadCurrentUICulture = new CultureInfo("en-US");
XmlLanaguage lang = XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag);
FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement), new FrameworkPropertyMetadata(lang));
FrameworkContentElement.LanguageProperty.OverrideMetadata(typeof(System.Windows.Documents.TextElement), new FrameworkPropertyMetadata(lang));

为了在一个文化中建立一个单一的线程，

Thread.CurrentThread.CurrentCulture = new CultureInfo("EN-US");
Thread.CurrentThread.CurrentUICulture = new CultureInfo("EN-US");

或者你可以试试这个：

FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement), new FrameworkPropertyMetadata(Markup.XmlLanguage.GetLanguage(Globalization.CultureInfo.CurrentCulture.IetfLanguageTag)));

或者尝试构建一个适当的Attached Property，如下所示

public class CultureHelper : DependencyObject
{

    public string Culture
    {
        get { return (string)GetValue(CultureProperty); }
        set { SetValue(CultureProperty, value); }
    }



    // Using a DependencyProperty as the backing store for MyProperty.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty CultureProperty =
        DependencyProperty.RegisterAttached("Culture", typeof(string), typeof(CultureHelper), new FrameworkPropertyMetadata("en", CultureChanged));

    private static void CultureChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        //For testing purposes in designer only 
        if (DesignerProperties.GetIsInDesignMode(d))
        {
            Thread.CurrentThread.CurrentUICulture = new CultureInfo((string)e.NewValue);
        }

    }

    public static void SetCulture(DependencyObject element, string value)
    {
        element.SetValue(CultureProperty, value);
    }

    public static string GetCulture(DependencyObject element)
    {
        return (string)element.GetValue(CultureProperty);
    }

}