Twilio SDK for C# and .NET

The Twilio C# / .NET SDK makes it easy to interact with the Twilio API from your .NET application. The most recent version of the library can be found on NuGet. The Twilio C# SDK 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).

Install the Library

When your phone number receives an incoming message or phone call, Twilio will send an HTTP request to your .NET application

Twilio servers

Your .NET app tells Twilio how to respond (e.g. with a text message, phone menu, etc.)

Your app


// Incoming message from Twilio!
var messagingResponse =
    new MessagingResponse();
messagingResponse.Message("Hello from C#!");
return TwiML(messagingResponse);

View complete examples

Twilio gets the instructions from your .NET app and takes the appropriate action

Hello from C#!

Get Started

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

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

Once installed, try one of the code samples to the right or jump into one of the Quickstarts below.

Need to handle Twilio webhooks with ASP.NET MVC or ASP.NET Core? Be sure to also install the corresponding Twilio.AspNet package.

// Install the C# / .NET helper library from twilio.com/docs/csharp/install

using System;
using Twilio;
using Twilio.Rest.Api.V2010.Account;


class Program
{
    static void Main(string[] args)
    {
        // Find your Account SID and Auth Token at twilio.com/console
        // and set the environment variables. See http://twil.io/secure
        string accountSid = Environment.GetEnvironmentVariable("TWILIO_ACCOUNT_SID");
        string authToken = Environment.GetEnvironmentVariable("TWILIO_AUTH_TOKEN");

        TwilioClient.Init(accountSid, authToken);

        var message = MessageResource.Create(
            body: "This is the ship that made the Kessel Run in fourteen parsecs?",
            from: new Twilio.Types.PhoneNumber("+15017122661"),
            to: new Twilio.Types.PhoneNumber("+15558675310")
        );

        Console.WriteLine(message.Sid);
    }
}

Build your App

You've got an idea in mind. Let's get it to production.

Pick the docs that are right for you. These guides, sample app tutorials, and API reference docs will get you across the deploy line, straight to HTTP 200 OK.

Full .NET SDK Reference

Dig into the Twilio API and uncover that killer feature you need to make your app awesome. The full reference details every possible method that you can use.

There are a few common core classes used in the various tutorials and examples. They handle setting up a connection to Twilio, handling errors, and issuing security tokens for client apps.

Each REST API Resource has a corresponding .NET class that you can use to create, fetch, read, update, and delete resources.

You use TwiML to tell Twilio what to do when you are responding to a Twilio webhook (e.g. a message or a phone call).

Twilio SDK for C# and .NET

Get Started

Quickstarts

Build your App

.NET Tutorials

Twilio Tutorials

Blog Posts

Full .NET SDK Reference

Common classes

Common REST API Resource classes

Common TwiML classes

Get Started

Quickstarts

Build your App

.NET Tutorials

Twilio Tutorials

Blog Posts

Full .NET SDK Reference

Common classes

Common REST API Resource classes

Common TwiML classes

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