Generate slug from string - See https://en.wikipedia.org/wiki/Semantic_URL#Slug

Slug.cs

using System.Text.RegularExpressions;

namespace App.Extensions
{
    /// <summary>
    /// Generate slug from string
    /// </summary>
    public static class SlugExtensions
    {
        /// <summary>
        /// Identifies a string in human readable resamblance of words separated by dash "-"
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string ToSlug(this string s)
        {
            // remove accents and convert to lowercase
            s = s.WithoutAccent().ToLower();
            // replace non alphanumeric (A to Z or 0 to 9) characters with whitespace          
            s = Regex.Replace(s, @"[^a-z0-9\s-]", "");
            // convert multiple whitespace to single whitespace   
            s = Regex.Replace(s, @"\s+", " ").Trim();
            // truncate string if 45 chars+ and trim 
            s = s.Substring(0, s.Length <= 45 ? s.Length : 45).Trim();
            // replace whitespace with dash
            s = Regex.Replace(s, @"\s", "-");   
            // yeah!
            return s;
        }

        /// <summary>
        /// Get string without accent - good for getting any encoded string as whitespace and A-Z and 0-9 string
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string WithoutAccent(this string s)
        {
            // read bytes with cyrrelic encoding into byte array - no accents
            byte[] b = System.Text.Encoding.GetEncoding("Cyrillic").GetBytes(s);
            // return ASCII encoded text from "Cyrillic" byte array 
            return System.Text.Encoding.ASCII.GetString(b);
        }
    }
}