Send Email using SendGrid API in ASP.Net

Do you have used SendGrid functionality form email? 

public static bool SendMail(string From_Email,string to_Email, string Body, string Subject)
{
    try
    {
        // string to = ConfigurationManager.AppSettings["ToEmail"].ToString(); //To address 
        string to = test@domail.com;
        string from = test1@domain.com; //From address
 
        MailMessage mm = new MailMessage(from, to);
        mm.Subject = Subject;
        mm.Body = Body;
 
        mm.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
 
        // smtp.Host = ConfigurationManager.AppSettings["Host"].ToString();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
 
        //NetworkCred.UserName = ConfigurationManager.AppSettings["HostUser"].ToString(); //set From Email
        //NetworkCred.Password = ConfigurationManager.AppSettings["HostPassword"].ToString(); // Set Password of Email
 
        NetworkCred.UserName = AuthKey.Net_Cred_Email; //set From Email
        NetworkCred.Password = AuthKey.Net_Cred_Password; // Set Password of Email
 
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
        return true;
    }
    catch (Exception ex)
    {
        return false;
    }
}