Send Grid Email in F#

SendGridEmail

#r "~/packages/Sendgrid.5.1.0/lib/SendGridMail.dll"
#r "~/packages/SendGrid.SmtpApi.1.2.1/lib/net40/SendGrid.SmtpApi.dll"

open System
open System.Collections.Generic
open System.Net
open System.Net.Mail
open SendGrid

let message = new SendGridMessage()
message.From <- new MailAddress("snadella@microsoft.com")
let recipients = new List<string>()
recipients.Add("bgates@microsoft.com")
message.AddTo(recipients)

message.Subject <- "Testing the SendGrid Library"
message.Html <- "<p>Hello World!</p>"
message.Text <- "Hello world plain text!"

let username = "yourNameHere";
let pswd = "yourPasswordHere";
let credentials = new NetworkCredential(username, pswd);
let transportWeb = new Web(credentials);

try
    let mailResult = transportWeb.Deliver(message);
    ()
with
    | :? Exceptions.InvalidApiRequestException as ex -> ex.Errors |>  Seq.iter( fun e -> printfn "Exception! %s " e)