C# string.ToSlug() Extension Method

StringToSlug.cs

public static string ToSlug(this string source, short limit)
{
    // Is the source null?
    if (null == source) {
        return "";
    }

    // Remove accents
    var bytes = Encoding.GetEncoding("Cyrillic").GetBytes(source);
    var value = Encoding.ASCII.GetString(bytes);

    // Converts "GooglePlus" to "-google-plus"
    value = Regex.Replace(value, @"([A-Z])", "-$1").ToLowerInvariant();

    // Remove invalid characters
    value = Regex.Replace(value, @"[^a-z0-9]+", "-");

    // Remove hyphens
    value = value.Trim('-');

    // Check the limit and truncate the string
    if (limit > 0 && value.Length > limit)
    {
        value = value.Substring(0, limit).Trim('-');
    }

    return value;
}