# Introduction

The next few chapters cover the settings of the FhirClient and the CRUD
interactions you can perform with it. We will then give some examples of history
and search interactions, and explain how to perform operations and transactions.
There's also a section on helper methods for resource identities, and we end the
chapter with other miscellaneous methods and helpers in the `Hl7.Fhir.Rest`
namespace.

To get started, add this `using` directive to your code:

```csharp
using Hl7.Fhir.Rest;
```