Send SMS Using Twilio In C#

This article will help you to send SMS from your application to the user’s phone number for a specific region. Generally Twilio is used to send/ receive a message from the US region.

First Step is to create an account in Twilio using the Sign-Up form here:

Login to your Twilio account and get a number using the free Trial Balance. The trial account is restricted to one number only.

We will be using the following three things from the Twilio Dashboard

Here I have created a demo to send SMS with the message entered by the user to the number entered by the user.

So we will have a view something like this

    SMS Sample
<div class="container">
    <div class="col-md-6">
        <form method="post" id="textform">
            <div class="form-group">
                <label>Phone Number</label>
                <input type="number" name="txtphone" id="txtphone" class="form-control" required />
            <div class="form-group">
                <textarea type="text" name="txtMessage" id="txtMessage" class="form-control" required></textarea>
            <button type="button" class="btn btn-primary" id="btnsubmit">Submit</button>

The click event for the button will send the data to the controller

$("#btnsubmit").click(() => {

           if ($("#textform").valid()) {
                   url: '/Home/SendSMS',
                   dataType: 'JSON',
                   type: 'POST',
                   data: {
                       ToPhone: $("#txtphone").val(),
                       Message: $("#txtMessage").val()
                   success: function (result) {
                       if (result) {
                       else {
                           alert("Sorry Server is busy");
                   error: function (error) {
                       alert("Sorry Server is busy");


Add the keys from Twilio account to your web.config

<add key="AccountSID" value="****************************" />   <!--Account SID of your Twilio account-->
<add key="AuthToken" value="****************************" />  <!--Auth Token of your Twilio account-->
<add key="TwilioPhone" value="+************" />    <!--TRIAL Number-->

Add Twilio Nuget Package. Search Twilio in Manage Nuget Package and click on Install.

The function used to send the SMS will be having the following code

     public JsonResult SendSMS(String ToPhone, string Message)
             //Fetch all the keys in webconfig file
             string accountSid = ConfigurationManager.AppSettings["AccountSID"];   // Account SID of your Twilio account 
             string authToken = ConfigurationManager.AppSettings["AuthToken"];  // Auth Token of your Twilio account
             string PhoneNumber = ConfigurationManager.AppSettings["TwilioPhone"];  // TRIAL Number
             System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
             TwilioClient.Init(accountSid, authToken);

             ToPhone = ToPhone.Replace("(", "");
             ToPhone = ToPhone.Replace(")", "");
             ToPhone = ToPhone.Replace("-", "");
             ToPhone = ToPhone.Replace(" ", "");
             ToPhone = "+91" + ToPhone;

             var to = new PhoneNumber(ToPhone);
             var message = MessageResource.Create(
                 to: to,
                 from: new PhoneNumber(PhoneNumber),
                 body: Message

             return Json(new { Status = true, message = "Message Sent Successfully." }, JsonRequestBehavior.AllowGet);

         catch (Exception ex)
             return Json(new { Status = false, message = ex.Message }, JsonRequestBehavior.AllowGet);



Now your demo is ready to run. After sending the SMS you can check the logs in your Twilio portal here:

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