Look up a number with .NET
You can quickly see how the Number Lookup API works by looking up a number using the API.
In this guide you will learn:
What you need to know before you start
Before you can get started, you need the following already set up:
- Set all Number Lookup API configuration settings.
- .NET 7.0 or later SDK and .NET Runtime and a familiarity with how to create an app.
Set up your .NET application
Create a new project folder and open a command prompt. Execute the following command to create a new .NET console application:
dotnet new consoleThis creates a new console application and project.
Modify your application
In your project folder, open the Program.cs file and paste the provided "Program.cs" code into the file, replacing all the existing content.
Note:
This tutorial uses basic authentication for testing purposes. We recommend using a signed request for authentication in a production environment. You can follow the steps in this guide, but use the code samples from here to use request signing authentication instead.
Fill in your parameters
Before you can run the code, you need to update some more values so you can connect to your Sinch account. Update the following parameters with your own values:
| Parameter | Your value |
|---|---|
_key | The key found on your Sinch dashboard. |
_secret | The secret found on your Sinch dashboard. |
_number | The phone number that you want to look up in E.164 format. |
Save the file.
Build your project
Before executing your code, you must first compile your application. Execute the following command:
dotnet buildLook up your phone number
Now you can execute the code and look up your phone number. Run the following command:
dotnet runYou should receive a response in your console with details about the phone number you specified.
Troubleshooting tip
If after running your app you receive a 5000 error response, you may have forgotten to save your file after adding your authentication values. This is an easy mistake to make! Try saving the file and running the app again.
