Send emails using gmail account and C# with HTML body

  public static void SendVendorConformed(string ToEmail, string VendorName,string TemplateUrl)  
     {  
       string config_email = "frommail";  
       string config_password = "password";  
       string config_adminemail = ToEmail;  
       var fromAddress = new MailAddress(config_email, "Title");  
       var toAddress = new MailAddress(ToEmail, VendorName);  
       var toAddressDefault = new MailAddress(config_adminemail, "Title");  
       string subject = "Rupdarshi";  
       //StreamReader str = new StreamReader(TemplateUrl);  
       string MailText = File.ReadAllText(TemplateUrl);  
       //MailText = MailText.Replace("{{name}}!", VendorName);  
       MailText = MailText.Replace("{{name}}", VendorName);  
       MailText = MailText.Replace("{{username}}", VendorName);  
       MailText = MailText.Replace("{{email}}", ToEmail);  
       //str.Close();  
       var smtp = new SmtpClient  
       {  
         Host = "smtp.gmail.com",  
         Port = 587,  
         EnableSsl = true,  
         DeliveryMethod = SmtpDeliveryMethod.Network,  
         UseDefaultCredentials = false,  
         Credentials = new NetworkCredential(config_email, config_password)  
       };  
       using (var message = new MailMessage(fromAddress, toAddress)  
       {  
         Subject = subject,  
         IsBodyHtml = true,  
         Body = MailText,  
       })  
       {  
         smtp.Send(message);  
       }  
       using (var message = new MailMessage(fromAddress, toAddressDefault)  
       {  
         Subject = subject,  
         IsBodyHtml = true,  
         Body = MailText,  
       })  
       {  
         smtp.Send(message);  
       }  
     }