> ## Documentation Index > Fetch the complete documentation index at: https://plivo.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Get Started with .NET > Send your first SMS using .NET Core with Plivo APIs and SDKs > [tab] .NET Core > > # Get Started with .NET Core > > ## Sign up for a Plivo account > > When you [sign up with Plivo](https://cx.plivo.com/signup), we give you a free trial account and free credits to experiment with and learn about our services. You can [add a number](https://cx.plivo.com/phone-numbers) to your account to start testing the full range of our voice and SMS service features. > > Follow these steps to get a free trial account: > > 1. [Sign up](https://cx.plivo.com/signup) with your work email address. > 2. Check your inbox for an activation email message from Plivo. Click on the link in the message to activate your account. > 3. Enter your mobile number to complete the phone verification step. > > ### Sign up with your work email address > > ![](https://mintcdn.com/plivo/Ac6PoKJHHxDx1U63/images/signup.png?fit=max\&auto=format\&n=Ac6PoKJHHxDx1U63\&q=85\&s=56190e6fffc6ae0c70dba8c7c69f435b) > > If you have any issues creating a Plivo account, please contact our [support team](https://support.plivo.com/hc/en-us/) for assistance. > > To get started, try sending an SMS message either by using our API and XML documents, or via , our visual design tool, which allows you to create message flows using an intuitive canvas and deploy them with few clicks. > > > [tab] Using API > > > > ## Install .NET Core and the Plivo .NET SDK > > > > You must set up and install .NET Core and Plivo’s .NET SDK before you send your first SMS message. > > > > ### Install .NET Core > > > > You can check whether you already have .NET Core installed under macOS or Linux and what version is installed by running the command `dotnet --version` in a terminal window. Under Windows there are [several ways to check](https://docs.microsoft.com/en-us/dotnet/framework/migration-guide/how-to-determine-which-versions-are-installed#determine-which-net-implementation-and-version-an-app-is-running-on). If you don’t have it or need a more current version, [download and install it](https://dotnet.microsoft.com/download). > > > > ### Install the Plivo .NET SDK > > > > Create a projects directory and change into it. > > > > ```sh theme={null} > > $ mkdir mydotnetcoreapps > > $ cd mydotnetcoreapps > > ``` > > > > Install the Plivo SDK using the [.NET CLI](https://docs.microsoft.com/en-us/dotnet/core/tools/). > > > > ```sh theme={null} > > $ dotnet new console > > $ dotnet add package Plivo > > ``` > > > > Once you’ve set up your development environment, you can start sending and receiving messages using our APIs and XML documents. Here are three common use cases to get you started. > > > > ## Send your first outbound SMS/MMS message > > > > You must have a Plivo phone number to send messages to the US or Canada; you can buy a Plivo number from Phone Numbers > [Buy Numbers](https://cx.plivo.com/phone-numbers) on the Plivo console or via the [Numbers API](https://plivo.com/docs/numbers/phone-numbers.md#buy-a-phone-number). > > > > ### Code > > > > Open the file in the CS project called `Program.cs` and paste into it this code. > > > > > [tab] SMS > > > > > > ```cs theme={null} > > > using System; > > > using System.Collections.Generic; > > > using Plivo; > > > > > > namespace testplivo > > > { > > > internal class Program > > > { > > > public static void Main(string[] args) > > > { > > > var api = new PlivoApi("",""); > > > var response = api.Message.Create( > > > src: "", > > > dst: new List { "" }, > > > text: "Hello, from .NET Core!" > > > ); > > > Console.WriteLine(response); > > > } > > > } > > > } > > > ``` > > > > > [tab] MMS > > > > > > ```cs theme={null} > > > using System; > > > using System.Collections.Generic; > > > using Plivo; > > > > > > namespace testplivo > > > { > > > internal class Program > > > { > > > public static void Main(string[] args) > > > { > > > var api = new PlivoApi("",""); > > > var response = api.Message.Create( > > > src: "", > > > dst: "", > > > text: "Hello, MMS from .NET Core!", > > > type:"mms", > > > media_urls: new string[]{"https://media.giphy.com/media/26gscSULUcfKU7dHq/source.gif"}, > > > media_ids: new String[]{"801c2056-33ab-499c-80ef-58b574a462a2"} > > > ); > > > Console.WriteLine(response); > > > } > > > } > > > } > > > ``` > > > > Replace the auth placeholders with your authentication credentials from the [Plivo console](https://cx.plivo.com/home). Replace the phone number placeholders with actual phone numbers in [E.164 format](https://en.wikipedia.org/wiki/E.164) (for example, +12025551234). In countries other than the US and Canada you can use a [sender ID](https://plivo.com/docs/messaging/concepts/sender-id-usage.md) for the message source. > > > > > [!NOTE] > > > > > > **Note:** > > > We recommend that you store your credentials in the `auth_id` and `auth_token` environment variables to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use the [Environment.SetEnvironmentVariable](https://docs.microsoft.com/en-us/dotnet/api/system.environment.setenvironmentvariable?view=netcore-3.1) method to store environment variables and [Environment.GetEnvironmentVariable](https://docs.microsoft.com/en-us/dotnet/api/system.environment.getenvironmentvariable?view=netcore-3.1) to fetch them when initializing the client. > > > > ### Test > > > > Save the file and run it. > > > > ```sh theme={null} > > $ dotnet run > > ``` > > > > ## Receive your first inbound SMS/MMS message > > > > To receive incoming messages, you must have a Plivo phone number that supports SMS; you can rent numbers from the [Numbers](https://cx.plivo.com/phone-numbers) page of the Plivo console or by using the [Numbers API](https://plivo.com/docs/numbers.md). > > > > ### Create an MVC project > > > > In the .NET Core projects directory, create a new [MVC](https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-new#web-options) project. > > > > ```sh theme={null} > > $ dotnet new mvc --no-https > > ``` > > > > Navigate to the Controllers subdirectory, create a controller named `ReceiveSmsController.cs`, and paste into it this code. > > > > > [tab] SMS > > > > > > ```cs theme={null} > > > using System; > > > using Microsoft.AspNetCore.Mvc; > > > > > > namespace ReceiveSms.Controllers > > > { > > > public class ReceiveSmsController : Controller > > > { > > > // GET: // > > > public String Index() > > > { > > > String from_number = Request.Form["From"]; > > > String to_number = Request.Form["To"]; > > > String text = Request.Form["Text"]; > > > Console.WriteLine("Message received - From: {0}, To: {1}, Text: {2}", from_number, to_number, text); > > > > > > return "Message received"; > > > } > > > } > > > } > > > ``` > > > > > [tab] MMS > > > > > > ```cs theme={null} > > > using System; > > > using Microsoft.AspNetCore.Mvc; > > > > > > namespace ReceiveSms.Controllers > > > { > > > public class ReceiveSmsController : Controller > > > { > > > // GET: // > > > public String Index() > > > { > > > String from_number = Request.Form["From"]; > > > String to_number = Request.Form["To"]; > > > String text = Request.Form["Text"]; > > > String media_url = Request.Form["Media0"]; > > > Console.WriteLine("Message received - From: {0}, To: {1}, Text: {2}, Media:{3}", from_number, to_number, text, media_url); > > > > > > return "Message received"; > > > } > > > } > > > } > > > ``` > > > > Before you start the application, edit Properties/launchSettings.json and set `applicationUrl`. > > > > ```json theme={null} > > "applicationUrl": "http://localhost:5000/" > > ``` > > > > Start the local server. > > > > ```sh theme={null} > > $ dotnet run > > ``` > > > > You should see your basic server application in action at [http://localhost:5000/receivesms/](http://localhost:5000/receivesms/). > > > > ### Expose your local server to the internet > > > > To receive incoming messages, your local server must connect with Plivo API services. For that, we recommend using [ngrok](https://ngrok.com/download), which exposes local servers running behind NATs and firewalls to the public internet over secure tunnels. Using ngrok, you can set webhooks that can talk to the Plivo server. > > > > ![ngrok block diagram](https://mintcdn.com/plivo/M2NzHE_bNZbCm0gd/images/ngrok-diagram.png?fit=max\&auto=format\&n=M2NzHE_bNZbCm0gd\&q=85\&s=b2ef4b4d52c133d126fd0d4303c33a61) > > > > Install ngrok and run it on the command line, specifying the port that hosts the application on which you want to receive messages (5000 in this case): > > > > ```shell theme={null} > > ./ngrok http 5000 > > ``` > > > > This starts the ngrok server on your local server. Ngrok will display a forwarding link that you can use as a webhook to access your local server over the public network. > > > > ![Sample ngrok CLI](https://mintcdn.com/plivo/M2NzHE_bNZbCm0gd/images/ngrok.png?fit=max\&auto=format\&n=M2NzHE_bNZbCm0gd\&q=85\&s=ce35ccb7eebdb2af565a2a3a2cf2be18) > > > > Now people can send messages to your Plivo number. > > > > ### Create a Plivo application to receive messages > > > > Associate the controller you created with Plivo by creating a Plivo application. Visit Messaging > [Applications](https://cx.plivo.com/xml-applications) and click **Add New Application**. You can also use Plivo's [Application API](https://plivo.com/docs/account/api/application.md#create-an-application). > > > > Give your application a name — we called ours `Receive SMS`. Enter the server URL you want to use (for example `https://.com/receive_sms/`) in the `Message URL` field and set the method to `POST`. Click **Create Application** to save your application. > > > > ![Create Application](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/create_SMS_app.jpg?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=665006f2112a8e6113716029adfbf2a7) > > > > ### Assign a Plivo number to your application > > > > Navigate to the [Numbers](https://cx.plivo.com/phone-numbers) page and select the phone number you want to use for this application. > > > > From the Application Type drop-down, select `XML Application`. > > > > From the Plivo Application drop-down, select `Receive SMS` (the name we gave the application). > > > > Click **Update Number** to save. > > > > ![Assign Phone Number to Receive SMS App](https://mintcdn.com/plivo/NFI9_HRHTMInDf93/images/assign_SMS_app.jpg?fit=max\&auto=format\&n=NFI9_HRHTMInDf93\&q=85\&s=94324dc41c7e8ade7a60c98e5fe20094) > > > > ### Test > > > > Send a text message to the Plivo number you specified using any phone. > > > > ## Reply to an incoming SMS/MMS message > > > > To receive incoming messages, you must have a Plivo phone number that supports SMS; you can rent numbers from the [Numbers](https://cx.plivo.com/phone-numbers) page of the Plivo console or by using the [Numbers API](https://plivo.com/docs/numbers.md). > > > > ### Create a .NET controller > > > > Create a controller called ReplytoInboundController.cs in the Controllers directory and paste into it this code. > > > > ```cs theme={null} > > using System; > > using System.Collections.Generic; > > using Microsoft.AspNetCore.Mvc; > > > > namespace ReceiveSms.Controllers > > { > > public class ReplytoInboundController : Controller > > { > > // GET: // > > public IActionResult Index() > > { > > String from_number = Request.Form["From"]; > > String to_number = Request.Form["To"]; > > String text = Request.Form["Text"]; > > Plivo.XML.Response resp = new Plivo.XML.Response(); > > resp.AddMessage("This is an automatic response", > > new Dictionary() > > { > > {"src", to_number}, > > {"dst", from_number}, > > {"type", "sms"} > > }); > > var output = resp.ToString(); > > Console.WriteLine(output); > > return this.Content(output, "text/xml"); > > } > > } > > } > > ``` > > > > If you haven’t done so already, expose your local server to the internet. > > > > ### Create a Plivo application to reply to messages > > > > Associate the controller you created with Plivo by creating a Plivo application. Visiting Messaging > [Applications](https://cx.plivo.com/xml-applications) and click **Add New Application**. You can also use Plivo's [Application API](https://plivo.com/docs/account/api/application.md#create-an-application). > > > > Give your application a name — we called ours `Reply Incoming SMS`. Enter the server URL you want to use (for example `http://.com/replysms/`) in the `Message URL` field and set the method to `POST`. Click **Create Application** to save your application. > > > > ![Create Application](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/create_reply_sms.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=0371a975aa748267124e9ea9debc7a0f) > > > > ### Assign a Plivo number to your application > > > > Navigate to the [Numbers](https://cx.plivo.com/phone-numbers) page and select the phone number you want to use for this application. > > > > From the Application Type drop-down, select `XML Application`. > > > > From the Plivo Application drop-down, select `Reply Incoming SMS` (the name we gave the application). > > > > Click **Update Number** to save. > > > > ### Test > > > > Start the local server. > > > > ```sh theme={null} > > $ dotnet run > > ``` > > > > Send a text message to the Plivo number you specified using any phone. You should receive a reply. > > > > ## More use cases > > > > We illustrate [more than a dozen use cases](https://plivo.com/docs/messaging/use-cases/send-an-sms/dotnet/) with code for both API/XML and PHLO on our documentation pages. > [tab] .NET Framework > > # Get Started with .NET Framework > > ## Sign up for a Plivo account > > When you [sign up with Plivo](https://cx.plivo.com/signup), we give you a free trial account and free credits to experiment with and learn about our services. You can [add a number](https://cx.plivo.com/phone-numbers) to your account to start testing the full range of our voice and SMS service features. > > Follow these steps to get a free trial account: > > 1. [Sign up](https://cx.plivo.com/signup) with your work email address. > 2. Check your inbox for an activation email message from Plivo. Click on the link in the message to activate your account. > 3. Enter your mobile number to complete the phone verification step. > > ### Sign up with your work email address > > ![](https://mintcdn.com/plivo/Ac6PoKJHHxDx1U63/images/signup.png?fit=max\&auto=format\&n=Ac6PoKJHHxDx1U63\&q=85\&s=56190e6fffc6ae0c70dba8c7c69f435b) > > If you have any issues creating a Plivo account, please contact our [support team](https://support.plivo.com/hc/en-us/) for assistance. > > To get started, try sending an SMS message either by using our API and XML documents, or via , our visual design tool, which allows you to create message flows using an intuitive canvas and deploy them with few clicks. > > > [tab] Using API > > > > ## Install .NET Framework and the Plivo .NET SDK > > > > You must set up and install .NET Framework 4.6 or higher and Plivo’s .NET SDK before you send your first SMS message. > > > > ### Install .NET Framework > > > > You can check whether you already have .NET Framework installed under macOS or Linux and what version is installed by running the command `dotnet --version` in a terminal window. Under Windows there are [several ways to check](https://docs.microsoft.com/en-us/dotnet/framework/migration-guide/how-to-determine-which-versions-are-installed#determine-which-net-implementation-and-version-an-app-is-running-on). If you don’t have it or need a more current version, [download and install it](https://dotnet.microsoft.com/download). > > > > ### Install the Plivo .NET SDK using Visual Studio > > > > Create a new project in Visual Studio. > > > > ![Create New Project](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/dotnet/step1.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=f803744f3c1cd5fe457ec42eede75f73) > > > > Choose a template for the new project. > > > > ![Choose Template](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/dotnet/step2.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=8260156bed2009fae53bfc83db5a72bf) > > > > Install the Plivo NuGet package. > > > > ![Manage NuGet packages](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/dotnet/step4.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=692009042f29a6480d8a82bfa5214dc6) > > > > ![Select Plivo NuGet package](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/dotnet/step5.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=1622783775c2d5c80ede2ad6df327352) > > > > Once you’ve set up your development environment, you can start sending and receiving messages using our APIs and XML documents. Here are three common use cases to get you started. > > > > ## Send your first outbound SMS/MMS message > > > > You must have a Plivo phone number to send messages to the US or Canada; you can rent a Plivo number from Phone Numbers > [Buy Numbers](https://cx.plivo.com/phone-numbers) on the Plivo console or via the [Numbers API](https://plivo.com/docs/numbers/phone-numbers.md#buy-a-phone-number). > > > > Open the file in the CS project called `Program.cs` and paste into it this code. > > > > ### Code > > > > > [tab] SMS > > > > > > ```cs theme={null} > > > using System; > > > using System.Collections.Generic; > > > using Plivo; > > > > > > namespace testplivo > > > { > > > internal class Program > > > { > > > public static void Main(string[] args) > > > { > > > var api = new PlivoApi("",""); > > > var response = api.Message.Create( > > > src: "", > > > dst: new List { "" }, > > > text: "Hello, from .NET Framework!" > > > ); > > > Console.WriteLine(response); > > > } > > > } > > > } > > > ``` > > > > > [tab] MMS > > > > > > ```cs theme={null} > > > using System; > > > using System.Collections.Generic; > > > using Plivo; > > > > > > namespace testplivo > > > { > > > internal class Program > > > { > > > public static void Main(string[] args) > > > { > > > var api = new PlivoApi("",""); > > > var response = api.Message.Create( > > > src: "", > > > dst: "", > > > text: "Hello, from .NET Framework!", > > > type:"mms", > > > media_urls: new string[]{"https://media.giphy.com/media/26gscSULUcfKU7dHq/source.gif"}, > > > media_ids: new String[]{"801c2056-33ab-499c-80ef-58b574a462a2"} > > > ); > > > Console.WriteLine(response); > > > } > > > } > > > } > > > ``` > > > > Replace the auth placeholders with your authentication credentials from the [Plivo console](https://cx.plivo.com/home). Replace the phone number placeholders with actual phone numbers in [E.164 format](https://en.wikipedia.org/wiki/E.164) (for example, +12025551234). In countries other than the US and Canada you can use a [sender ID](https://plivo.com/docs/messaging/concepts/sender-id-usage.md) for the message source. > > > > > [!NOTE] > > > > > > **Note:** > > > We recommend that you store your credentials in the `auth_id` and `auth_token` environment variables to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use the [Environment.SetEnvironmentVariable](https://docs.microsoft.com/en-us/dotnet/api/system.environment.setenvironmentvariable?view=netcore-3.1) method to store environment variables and [Environment.GetEnvironmentVariable](https://docs.microsoft.com/en-us/dotnet/api/system.environment.getenvironmentvariable?view=netcore-3.1) to fetch them when initializing the client. > > > > ### Test > > > > Before starting the application, edit Properties/launchSettings.json and set `applicationUrl`. > > > > ```json theme={null} > > "applicationUrl": "http://localhost:5000/" > > ``` > > > > Save the file and run it. > > > > ![Send outbound SMS](https://mintcdn.com/plivo/NFI9_HRHTMInDf93/images/build_app.png?fit=max\&auto=format\&n=NFI9_HRHTMInDf93\&q=85\&s=0ee6827b97bf45ef78c208741462a1e4) > > > > ## Receive your first inbound SMS/MMS message > > > > To receive incoming messages, you must have a Plivo phone number that supports SMS; you can rent numbers from the [Numbers](https://cx.plivo.com/phone-numbers) page of the Plivo console or by using the [Numbers API](https://plivo.com/docs/numbers.md). > > > > ### Create a .NET controller > > > > Navigate to the Controllers directory, create a controller called ReceiveSmsController.cs, and paste into it this code. > > > > ![Create Controller](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/create_controller.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=a7ec7769fad39d920defa0ec18f44dcd) > > > > > [tab] SMS > > > > > > ```cs theme={null} > > > using System; > > > using Microsoft.AspNetCore.Mvc; > > > > > > namespace ReceiveSms.Controllers > > > { > > > public class ReceiveSmsController : Controller > > > { > > > // GET: // > > > public String Index() > > > { > > > String from_number = Request.Form["From"]; > > > String to_number = Request.Form["To"]; > > > String text = Request.Form["Text"]; > > > Console.WriteLine("Message received - From: {0}, To: {1}, Text: {2}", from_number, to_number, text); > > > > > > return "Message received"; > > > } > > > } > > > } > > > ``` > > > > > [tab] MMS > > > > > > ```cs theme={null} > > > using System; > > > using Microsoft.AspNetCore.Mvc; > > > > > > namespace ReceiveSms.Controllers > > > { > > > public class ReceiveSmsController : Controller > > > { > > > // GET: // > > > public String Index() > > > { > > > String from_number = Request.Form["From"]; > > > String to_number = Request.Form["To"]; > > > String text = Request.Form["Text"]; > > > String media_url = Request.Form["Media0"]; > > > Console.WriteLine("Message received - From: {0}, To: {1}, Text: {2}, Media: {3}", from_number, to_number, text, media_url); > > > > > > return "Message received"; > > > } > > > } > > > } > > > ``` > > > > ### Test > > > > Before starting the application, edit Properties/launchSettings.json and set `applicationUrl`. > > > > ```json theme={null} > > "applicationUrl": "http://localhost:5000/" > > ``` > > > > Run the project and you should see your basic server application in action at [http://localhost:5000/receivesms/](http://localhost:5000/receivesms/). > > > > ### Expose your local server to the internet > > > > To receive incoming messages, your local server must connect with Plivo API services. For that, we recommend using [ngrok](https://ngrok.com/download), which exposes local servers running behind NATs and firewalls to the public internet over secure tunnels. Using ngrok, you can set webhooks that can talk to the Plivo server. > > > > ![ngrok block diagram](https://mintcdn.com/plivo/M2NzHE_bNZbCm0gd/images/ngrok-diagram.png?fit=max\&auto=format\&n=M2NzHE_bNZbCm0gd\&q=85\&s=b2ef4b4d52c133d126fd0d4303c33a61) > > > > Install ngrok and run it on the command line, specifying the port that hosts the application on which you want to receive messages (5000 in this case): > > > > ```shell theme={null} > > ./ngrok http 5000 > > ``` > > > > This starts the ngrok server on your local server. Ngrok will display a forwarding link that you can use as a webhook to access your local server over the public network. > > > > ![Sample ngrok CLI](https://mintcdn.com/plivo/M2NzHE_bNZbCm0gd/images/ngrok.png?fit=max\&auto=format\&n=M2NzHE_bNZbCm0gd\&q=85\&s=ce35ccb7eebdb2af565a2a3a2cf2be18) > > > > Now people can send messages to your Plivo number. > > > > ### Create a Plivo application to receive messages > > > > Associate the controller you created with Plivo by creating a Plivo application. Visiting Messaging > [Applications](https://cx.plivo.com/xml-applications) and click **Add New Application**. You can also use Plivo's [Application API](https://plivo.com/docs/account/api/application.md#create-an-application). > > > > Give your application a name — we called ours `Receive SMS`. Enter the server URL you want to use (for example `https://.com/receive_sms/`) in the `Message URL` field and set the method to `POST`. Click **Create Application** to save your application. > > > > ![Create Application](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/create_SMS_app.jpg?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=665006f2112a8e6113716029adfbf2a7) > > > > ### Assign a Plivo number to your application > > > > Navigate to the [Numbers](https://cx.plivo.com/phone-numbers) page and select the phone number you want to use for this application. > > > > From the Application Type drop-down, select `XML Application`. > > > > From the Plivo Application drop-down, select `Receive SMS` (the name we gave the application). > > > > Click **Update Number** to save. > > > > ![Assign Phone Number to Receive SMS App](https://mintcdn.com/plivo/NFI9_HRHTMInDf93/images/assign_SMS_app.jpg?fit=max\&auto=format\&n=NFI9_HRHTMInDf93\&q=85\&s=94324dc41c7e8ade7a60c98e5fe20094) > > > > ### Test > > > > Send a text message to the Plivo number you specified using any phone. > > > > ## Reply to an incoming SMS/MMS message > > > > To receive incoming messages, you must have a Plivo phone number that supports SMS; you can rent numbers from the [Numbers](https://cx.plivo.com/phone-numbers) page of the Plivo console or by using the [Numbers API](https://plivo.com/docs/numbers.md). > > > > ### Create a .NET controller > > > > Create a controller called ReplytoInboundController.cs in the Controllers directory and paste into it this code. > > > > ```cs theme={null} > > using System; > > using System.Collections.Generic; > > using Microsoft.AspNetCore.Mvc; > > > > namespace ReceiveSms.Controllers > > { > > public class ReplytoInboundController : Controller > > { > > // GET: // > > public IActionResult Index() > > { > > String from_number = Request.Form["From"]; > > String to_number = Request.Form["To"]; > > String text = Request.Form["Text"]; > > Plivo.XML.Response resp = new Plivo.XML.Response(); > > resp.AddMessage("This is an automatic response", > > new Dictionary() > > { > > {"src", to_number}, > > {"dst", from_number}, > > {"type", "sms"} > > }); > > var output = resp.ToString(); > > Console.WriteLine(output); > > return this.Content(output, "text/xml"); > > } > > } > > } > > ``` > > > > If you haven’t done so already, expose your local server to the internet. > > > > ### Create a Plivo application to reply to messages > > > > Associate the controller you created with Plivo by creating a Plivo application. Visiting Messaging > [Applications](https://cx.plivo.com/xml-applications) and click **Add New Application**. You can also use Plivo's [Application API](https://plivo.com/docs/account/api/application.md#create-an-application). > > > > Give your application a name — we called ours `Reply Incoming SMS`. Enter the server URL you want to use (for example `http://.com/replysms/`) in the `Message URL` field and set the method to `POST`. Click **Create Application** to save your application. > > > > ![Create Application](https://mintcdn.com/plivo/2OFvQXVNT3srKLUy/images/create_reply_sms.png?fit=max\&auto=format\&n=2OFvQXVNT3srKLUy\&q=85\&s=0371a975aa748267124e9ea9debc7a0f) > > > > ### Assign a Plivo number to your application > > > > Navigate to the [Numbers](https://cx.plivo.com/phone-numbers) page and select the phone number you want to use for this application. > > > > From the Application Type drop-down, select `XML Application`. > > > > From the Plivo Application drop-down, select `Reply Incoming SMS` (the name we gave the application). > > > > Click **Update Number** to save. > > > > ### Test > > > > Run the project. > > > > Send a text message to the Plivo number you specified using any phone. You should receive a reply. > > > > ## More use cases > > > > We illustrate [more than a dozen use cases](https://plivo.com/docs/messaging/use-cases/send-an-sms/dotnet/) with code for both API/XML and PHLO on our documentation pages.