Hafta kunlari o'zbekcha nomlari bilan

DayOfWeekFlag.cs

[Flags]
enum DayOfWeekFlag
{
    None = 0,
    Monday = 1,
    Tuesday = 2,
    Wednesday = 4,
    Thursday = 8,
    Friday = 16,
    Saturday = 32,
    Sunday = 64,
    
    OddDays = Monday | Wednesday | Friday,  // 1 | 4 | 16 = 21
    EvenDays = Tuesday | Thursday | Saturday, // 2 | 8 | 32 = 42
    Weekend = Saturday | Sunday  // 32 | 64 = 96
}

DayOfWeekFlagExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;

public static class DayOfWeekFlagExtensions
{
    private static readonly Dictionary<DayOfWeekFlag, string> UzbekTranslations = new()
    {
        { DayOfWeekFlag.None, "Hech qaysi" },
        { DayOfWeekFlag.Monday, "Dushanba" },
        { DayOfWeekFlag.Tuesday, "Seshanba" },
        { DayOfWeekFlag.Wednesday, "Chorshanba" },
        { DayOfWeekFlag.Thursday, "Payshanba" },
        { DayOfWeekFlag.Friday, "Juma" },
        { DayOfWeekFlag.Saturday, "Shanba" },
        { DayOfWeekFlag.Sunday, "Yakshanba" },
        { DayOfWeekFlag.OddDays, "Toq kunlar" },
        { DayOfWeekFlag.EvenDays, "Juft kunlar" },
        { DayOfWeekFlag.Weekend, "Dam olish kunlari" }
    };

    public static string ToUzbek(this DayOfWeekFlag flag) => ToUzbekOrDefault(flag) ?? "Hech qaysi";

    public static string? ToUzbekOrDefault(this DayOfWeekFlag flag, string? defaultValue = default)
    {
        if (UzbekTranslations.TryGetValue(flag, out var translation))
            return translation;

        var parts = UzbekTranslations
            .Where(entry => entry.Key != DayOfWeekFlag.None && flag.HasFlag(entry.Key) && entry.Key <= DayOfWeekFlag.Sunday)
            .Select(entry => entry.Value)
            .ToList();

        if (parts.Count == 0)
            return defaultValue;

        if (parts.Count == 1)
            return parts[0];

        return string.Join(", ", parts.Take(parts.Count - 1)) + " va " + parts.Last();
    }
}

Program.cs

Console.WriteLine(DayOfWeekFlag.OddDays.ToUzbek());  
// Output: "Toq kunlar"

Console.WriteLine((DayOfWeekFlag.Monday | DayOfWeekFlag.Wednesday).ToUzbek());  
// Output: "Dushanba va Chorshanba"

Console.WriteLine(((DayOfWeekFlag)128).ToUzbekOrDefault());  
// Output: null

Console.WriteLine(((DayOfWeekFlag)128).ToUzbekOrDefault("Noma’lum kunlar"));  
// Output: "Noma’lum kunlar"