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Build status NuGet

Recent Update

As of release 5.6.0, Beta and Developer Preview products are now exposed via the main twilio-python artifact. Releases of the alpha branch have been discontinued.

If you were using the alpha release line, you should be able to switch back to the normal release line without issue.

If you were using the normal release line, you should now see several new product lines that were historically hidden from you due to their Beta or Developer Preview status. Such products are explicitly documented as Beta/Developer Preview both in the Twilio docs and console, as well as through in-line code documentation here in the library.

Twilio REST API and TwiML Libraries for .NET

Twilio provides a simple HTTP-based API for sending and receiving phone calls and text messages. Learn more at http://www.twilio.com

Adding Twilio libraries to your .NET project

The best and easiest way to add the Twilio libraries to your .NET project is to use the NuGet package manager.

With Visual Studio IDE

From within Visual Studio, you can use the NuGet GUI to search for and install the Twilio NuGet package. Or, as a shortcut, simply type the following command into the Package Manager Console:

Install-Package Twilio

With .NET Core Command Line Tools

If you are building with the .NET Core command line tools, then you can run the following command from within your project directory:

dotnet add package Twilio

Sample Usage

The examples below show how to have your application initiate and outbound phone call and send an SMS message using the Twilio .NET helper library:

TwilioClient.Init("ACCOUNT_SID", "AUTH_TOKEN");

var call = CallResource.Create(
    new PhoneNumber("+11234567890"),
    from: new PhoneNumber("+10987654321"),
    url: new Uri("https://my.twiml.here")
);
Console.WriteLine(call.Sid);

var message = MessageResource.Create(
    new PhoneNumber("+11234567890"),
    from: new PhoneNumber("+10987654321"),
    body: "Hello World!"
);
Console.WriteLine(message.Sid);

TwiML Generation

// TwiML classes can be created as standalone elements
var gather = new Gather(numDigits: 1, action: new Uri("hello-monkey-handle-key.cshtml"), method: HttpMethod.Post)
    .Say("To speak to a real monkey, press 1. Press 2 to record your own monkey howl. Press any other key to start over.");

// Attributes can be set directly on the object
gather.Timeout = 100;
gather.MaxSpeechTime = 200

// Arbitrary attributes can be set by calling set/getOption
var dial = new Dial().SetOption("myAttribute", 200)
                     .SetOption("newAttribute", false);

// Or can be created and attached to a response directly using helper methods
var response = new VoiceResponse()
    .Say("Hello Monkey")
    .Play(new Uri("http://demo.twilio.com/hellomonkey/monkey.mp3"))
    .Append(gather)
    .Append(dial);
    
// Serialize the TwiML objects to XML string
Console.WriteLine(response);

/*
<?xml version="1.0" encoding="utf-8"?>
<Response>
  <Say>Hello Monkey</Say>
  <Play>http://demo.twilio.com/hellomonkey/monkey.mp3</Play>
  <Gather numDigits="1" action="hello-monkey-handle-key.cshtml" method="POST" timeout="100" maxSpeechTime="200">
    <Say>To speak to a real monkey, press 1. Press 2 to record your own monkey howl. Press any other key to start over.</Say>
  </Gather>
  <Dial myAttribute="200" newAttribute="false"></Dial>
</Response>
*/

Migrating from earlier versions

See the migration guide here. Also, if you were using the Twilio.Mvc package, that has been replaced by the Twilio.AspNet.Mvc package which is compatible with this version of the library.

Alpha Version

The alpha version is no longer necessary. All Twilio products are available in the main-line library.

Getting help

If you need help installing or using the library, please contact Twilio Support at help@twilio.com first. Twilio's Support staff are well-versed in all of the Twilio Helper Libraries, and usually reply within 24 hours.

If you've instead found a bug in the library or would like new features added, go ahead and open issues or pull requests against this repo!

Twilio REST API Documentation

Twilio TwiML Documentation