using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var defaultAdminConsoleLanguageCode = "";

        var defaultAcUseLanguageCookie = "sdf";

        var adminTranslationSettings = new

        {

            LanguageCode = ""

        };

        List<String> lcs = [defaultAdminConsoleLanguageCode, defaultAcUseLanguageCookie, adminTranslationSettings.LanguageCode];

        var languageCode = lcs.FirstOrDefault(StringExtensions.IsNotBlank, "enUS");

        var languageCode2 = defaultAdminConsoleLanguageCode.IsNotBlank() ? defaultAdminConsoleLanguageCode : defaultAcUseLanguageCookie.IsNotBlank() ? defaultAcUseLanguageCookie : adminTranslationSettings.LanguageCode.IsNotBlank() ? adminTranslationSettings.LanguageCode : "enUs";

        Console.WriteLine(languageCode);

        Console.WriteLine(languageCode2);

    }

}

​

public static class StringExtensions

{

    public static bool IsNotBlank(this String s)

    {

        if (s == "")

        {

            return false;

        }

​

        return true;

    }

}