how to replace value of navigate url of hyperlink in repeater in asp.net

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;

public static class LinkHelper
{
    private static readonly Regex ExtraHyphen = new Regex("\\-{2,}", RegexOptions.Compiled);
    
    private static readonly HashSet<char> IllegalChars = new HashSet<char>
    {
        ':', '/', '?', '#', '[', ']', '@', '*', '.', ',', '"', '\'',
    };
    
    private static string RemoveExtraHyphen(string text)
    {
        if (string.IsNullOrWhiteSpace(text)) return string.Empty;
        return ExtraHyphen.Replace(text, "-");
    }
    
    private static string RemoveDiacritics(string text)
    {
        if (string.IsNullOrWhiteSpace(text)) return string.Empty;
        
        string normalized = text.Normalize(NormalizationForm.FormD);
        
        return new string(normalized
            .Where(c => UnicodeCategory.NonSpacingMark != CharUnicodeInfo.GetUnicodeCategory(c))
            .ToArray());
    }
    
    public static string UrlSlug(string text)
    {
        if (string.IsNullOrWhiteSpace(text)) return string.Empty;
        
        string slug = new string(text
            .Where(c => !IllegalChars.Contains(c))
            .Select(c => ' ' == c ? '-' : c)
            .ToArray());
        
        slug = slug.Replace("&", "-and-");
        
        slug = RemoveDiacritics(slug);
        slug = RemoveExtraHyphen(slug);
        return HttpUtility.UrlEncode(slug).Replace("%", string.Empty);
    }
}

<asp:HyperLink ID="lbstatepincode" runat="server"
    NavigateUrl='<%# "~/" + LinkHelper.UrlSlug(Eval("state_name_without_pin", "{0}")) %>'  
    Text='<%#Bind("state_name")%>'
/>