Ytdyklly

I am reading a custom config section in my app.config and iterating through the URL's to get some response in JSOn and parse it to send the email with the details in there.
I got the basic walking skeleton of console App and I wanted to know how do I handle exceptions here, in the calling methods or the called methods. Also I would like advise on best practices on separating my code into multiple files if needed. Below is the code.

Program.cs

 static void Main(string args)

    {

        CustomConfigData customSection = ConfigurationManager.GetSection(CustomConfigData.SectionName) as CustomConfigData;

        string ToAddressList = "", MsgBody = "", MsgSubject = "", CCAddressList = "";

        string fromAddress= "Reminder@mycompany.com";

        if (customSection != null)

        {

            foreach (URLEndpointElement urlendpoint in customSection.Urlendpoints)

            {

                //Console.WriteLine($" URL Type = {urlendpoint.Type}, URL Value = {urlendpoint.Address}");

               // string response = GetResponse(urlendpoint.Address).ToString();

                string samplejson = @"{'To': 'abcd@mycompany.com','Cc': 'hijk@mycompany.com,efgh@mycompany.com','Subject': 'Sample Email','Body': 'Sample Email from the program. Pls Ignore..'}";

                ParseJSONResponse(samplejson , ref ToAddressList, ref MsgBody, ref MsgSubject, ref CCAddressList);

                Console.WriteLine(response);

                SendEmail(fromAddress, ToAddressList, CCAddressList, MsgSubject, MsgBody);

            }

        }

    }



    private static void ParseJSONResponse(string urlResponse, ref string toAddressList, ref string msgBody, ref string msgSubject, ref string cCAddressList)

    {

        JObject jsonresponse = JObject.Parse(urlResponse);

        toAddressList = jsonresponse["To"].ToString();

        cCAddressList= jsonresponse["Cc"].ToString();

        msgSubject = jsonresponse["Subject"].ToString();

        msgBody = jsonresponse["Body"].ToString();

    }



    //creating a non blocking GetMethod for URL

    private static async Task<string> GetResponse(string url)

    {

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);



        using (HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())

        using (Stream stream = response.GetResponseStream())

        using (StreamReader reader = new StreamReader(stream))

        {

            return await reader.ReadToEndAsync();

        }

    }



    private static void SendEmail(string FromAddress, string ToAddress, string CCAddress, string Subject, string Body)

    {

        SmtpClient smtp = new SmtpClient() {

            Host = "mail.mycompany.com",

            Port = 25,

        };

        MailMessage mailmsg = new MailMessage(FromAddress, ToAddress, Subject, Body);

//Assuming To and CC addresses are separated by ,

        mailmsg.To.Add(ToAddress);

        mailmsg.CC.Add(CCAddress);

        smtp.Send(mailmsg);

    }

The Configuration data class is in a separate folder under Configuration in the Solution.
Please code review this with best practices on Exception handling.