DateTime.Now.DayOfWeek.ToString（）与CultureInfo

var culture = new System.Globalization.CultureInfo(\"de-DE\");
var day = culture.DateTimeFormat.GetDayName(DateTime.Today.DayOfWeek);

CultureInfo

DateTimeFormat.DayNames

CultureInfo german = new CultureInfo(\"de-DE\");
string sunday = german.DateTimeFormat.DayNames[(int)DayOfWeek.Sunday];

Dim GermanCultureInfo As Globalization.CultureInfo = New Globalization.CultureInfo(\"de-DE\")

Return GermanCultureInfo.DateTimeFormat.GetDayName(DayOfWeek.Sunday)

DateTime.Now.ToString(\"dddd\", new System.Globalization.CultureInfo(\"de-DE\"))

DayOfWeek

ToString

DayOfWeek

string DayOfWeekGerman(DayOfWeek dow)
{

    switch(dow)
    {
      case(DayOfWeek.Sunday)
         return \"German Sunday\";
      case(DayOfWeek.Monday)
         return \"German Monday\";
      ...
    }
}

DateTime

ToString

CultureInfo german = new CultureInfo(\"de-DE\");
string dayName = DateTime.Now.ToString(\"dddd\", german);

public static class DateTimeExtension
{
    public static string GetDayOfWeek(this DateTime uiDateTime, CultureInfo culture = null)
    {
        if (culture == null)
        {
            culture = Thread.CurrentThread.CurrentUICulture;
        }

        return culture.DateTimeFormat.GetDayName(uiDateTime.DayOfWeek);
    }
}

var culture = new System.Globalization.CultureInfo(\"de-DE\");
var day = uiDateTime.GetDayOfWeek(culture);

CultureInfo myCI = new CultureInfo(\"ar-EG\");   
MessageBox.Show(myCI.DateTimeFormat.GetDayName(DayOfWeek.Friday));

DateTime

DayOfWeek