# Telesign Full-service C# SDK
Telesign connects, protects, and defends the customer experience with intelligence from billions of digital interactions and mobile signals. Through developer-friendly APIs that deliver user verification, digital identity, and omnichannel communications, we help the world's largest brands secure onboarding, maintain account integrity, prevent fraud, and streamline omnichannel engagement.
NOTE:
These instructions are for MacOS. They will need to be adapted if you are installing on Windows.
Follow these steps to add this SDK as a dependency to your project.
telesign_integrations
directory. cd ~/code/local
mkdir telesign_integrations
cd telesign_integrations
mkdir {your project name}
cd {your project name}
Create a new C# solution using the dotnet CLI in the top-level directory of your project.
dotnet new console -o {name of the solution}
For example:
dotnet new console -o SendSMS
Install the Telesign Full-service C# SDK using the dotnet CLI. This will also install the Telesign Self-service C# SDK since it is a dependency for the Full-service SDK.
dotnet add package TelesignEnterprise --version 2.2.3
Once the SDK is installed, you should see a message in the terminal notifying you that you have successfully installed the SDK.
NOTE:
There are alternate ways of installing this SDK. For examples, see this SDK's page in the NuGet gallery.
If you use a Telesign SDK to make your request, authentication is handled behind-the-scenes for you. All you need to provide is your Customer ID and API Key. The SDKs apply Digest authentication whenever they make a request to a Telesign service where it is supported. When Digest authentication is not supported, the SDKs apply Basic authentication.