C# Slug Generator

using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;

namespace Extensions;

public static partial class StringExtensions
{
    #region - ToSlug -

    public static string ToSlug(this string self, int maxLength = 1024)
    {
        if (string.IsNullOrEmpty(self))
        {
            return self;
        }

        var str = RemoveAccent(self).ToLower(CultureInfo.InvariantCulture);

        str = InvalidCharsRegEx().Replace(str, ""); // invalid chars
        str = MultipleWhitespacesRegEx().Replace(str, " ").Trim(); // convert multiple spaces into one space
        str = str.Substring(0, str.Length <= maxLength ? str.Length : maxLength).Trim(); // cut and trim it
        str = WhitespaceRegEx().Replace(str, "-"); // hyphens
        str = MultipleHyphensRegEx().Replace(str, "-");

        return str.Trim('-'); // trim leading and trailing hyphens
    }

    private static string RemoveAccent(string value)
    {
        var bytes = Encoding.GetEncoding("Cyrillic").GetBytes(value);
        return Encoding.ASCII.GetString(bytes);
    }

    [GeneratedRegex("[^a-z0-9\\s-]")]
    private static partial Regex InvalidCharsRegEx();

    [GeneratedRegex("\\s+")]
    private static partial Regex MultipleWhitespacesRegEx();

    [GeneratedRegex("\\-+")]
    private static partial Regex MultipleHyphensRegEx();

    [GeneratedRegex("\\s")]
    private static partial Regex WhitespaceRegEx();

    #endregion
}