static void Main(string[] args) { Dictionary <string, string> source = new Dictionary <string, string>(); source.Add("format", "1"); source.Add("key", "123"); source.Add("accept-language", "ua"); source.Add("addressdetails", "sdf4 sdgfdsf"); source.Add("namedetails", "detail"); source.Add("extratags", "ext"); source.Add("email", "email"); string sc = StringFormatExtensions.NamedFormat("https:\\nomi", source); Console.WriteLine(sc); //Console.ReadLine(); }