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 on twilio.com.
More documentation for this library can be found here.
Migrating from earlier versions
TLS 1.2 Requirements
New accounts and subaccounts are now required to use TLS 1.2 when accessing the REST API. "Upgrade Required" errors indicate that TLS 1.0/1.1 is being used. With .NET, you can enable TLS 1.2 using this setting:
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
Supported .NET versions
This library supports .NET applications written in C#, VB.Net, and F# that utilize .NET Framework 3.5 or above or any supported version of .NET Core (.NET Standard v1.4).
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:
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
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);
To control phone calls, your application needs to output TwiML.
// 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> */
Dockerfile present in this repository and its respective
twilio/twilio-csharp Docker image are currently used by Twilio for testing purposes only.
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!