Kebab case resolver extension for Newtonsoft.JSON library

KebabCaseResolver.cs

using Newtonsoft.Json.Serialization;

namespace Asseco.JsonUtils
{
    public class KebabCaseResolver : DefaultContractResolver
    {
        private Regex regex = new Regex("(?<!^)((?<=[a-zA-Z0-9])[A-Z][a-z])|((?<=[a-z])[A-Z])", RegexOptions.Compiled);

        protected override string ResolvePropertyName(string propertyName)
        {
            return regex.Replace(propertyName, "-$1$2").ToLower();
        }
    }    
}