Download & Install

nuget install Bandwidth.Sdk -OutputDirectory packages

*Note: This only adds the package to the disk. The packages.config or dependency file needs to be modified to add it to the project.

Initialize Bandwidth Voice & Message Client

*Note: If you see this error System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. This code may be needed System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;

using Bandwidth.Standard;
using Bandwidth.Standard.Voice.Controllers;
using Bandwidth.Standard.Messaging.Controllers;

//create Configuration with credentials
Configuration config = new Configuration.Builder()

//Activate the Client with the Configuration
APIController msgController = new BandwidthClient(config).Messaging.Client;
APIController voiceController = new BandwidthClient(config).Voice.Client;

Create Phone Call

using Bandwidth.Standard.Voice.Controllers;

callRequest.ApplicationId = "3-d-4-b-5";
callRequest.AnswerUrl= "https://test.com";

//Be aware that the Voice Client can throw exceptions
try {
    voiceController.CreateCall("account.id", callRequest);
} catch (APIException e) {
    WriteLine( e.Message );
} catch (IOException e) {
    WriteLine( e.Message );

Generate BXML

using Bandwidth.Standard.Voice.Bxml;

//Bandwidth XML (BXML) verb SpeakSenetence plays the sentence audio
SpeakSentence speakSentence = new SpeakSentence();
speakSentence.Sentence = "Hello World";

//Add the verb to a Response object
Response res =  new Response();

//view the BXML
Console.write( res.ToBXML() );

Send Text Message

using Bandwidth.Standard.Messaging;
using Bandwidth.Standard.Messaging.Controllers;
using Bandwidth.Standard.Messaging.Models;

MessageRequest msgRequest = new MessageRequest();
msgRequest.ApplicationId = applicationId;
msgRequest.From = "+18888888888";
msgRequest.To = new string[1] {"9199199999"};
msgRequest.Text = "The quick brown fox jumps over a lazy dog.";

msgController.CreateMessage(msgUserId, msgRequest);

Order Phone Number

//Coming soon

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