QueryParameters.ToString C# (CSharp) Method

    public override string ToString()
    {
        var result = new StringBuilder(2000);

        if (parameterSet != null)
        {
          foreach (string key in parameterSet.Keys)
          {
        result.Append(key + ": ");

        string sep = "";
        foreach (string item in parameterSet[key])
        {
          result.Append(sep + item);
          sep = ", ";
        }
        result.Append("<br />");
          }
        }
        return result.ToString();
    }

        public void Constructors()
        {
            QueryParameters query01 = new QueryParameters();

            Console.WriteLine($"query01                 = {query01}");
            Console.WriteLine($"query01.ToString()      = {query01.ToString()}");
            Console.WriteLine($"query01.ToString(\"D\") = {query01.ToString("D")}");
            Console.WriteLine($"query01.ToString(\"F\") = {query01.ToString("F")}");
            Console.WriteLine($"query01.ToString(\"Q\") = {query01.ToString("Q")}");

            Dictionary <string, string> oauth_authorization = new Dictionary <string, string>()
            {
                { "client_id", "client_id_obtained_string" },
                { "response_type", "code" },
                { "redirect_uri", "http://localhost" },
                { "scope", "" },
                { "state", "" },
            };

            QueryParameters query02 = new QueryParameters(oauth_authorization);

            Console.WriteLine($"query02                 = {query02}");
            Console.WriteLine($"query02.ToString()      = {query02.ToString()}");
            Console.WriteLine($"query02.ToString(\"D\") = {query02.ToString("D")}");
            Console.WriteLine($"query02.ToString(\"F\") = {query02.ToString("F")}");
            Console.WriteLine($"query02.ToString(\"Q\") = {query02.ToString("Q")}");

            return;
        }