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# Part IV

# Creating .NET Extend Clients

Coherence for .NET allows .NET applications to access Coherence clustered services, including data, data events, and data processing from outside the Coherence cluster. Typical uses of Coherence for .NET include desktop and web applications that require access to Coherence caches.

Coherence for .NET consists of a lightweight .NET library that connects to a Coherence*Extend clustered service instance running within the Coherence cluster using a high performance TCP/IP-based communication layer. This library sends all client requests to the Coherence*Extend clustered service which, in turn, responds to client requests by delegating to an actual Coherence clustered service (for example, a Partitioned or Replicated cache service).

An `INamedCache` instance is retrieved by using the `CacheFactory.GetCache(...)` API call. Once it is obtained, a client accesses the `INamedCache` in the same way as it would if it were part of the Coherence cluster. The fact that `INamedCache` operations are being sent to a remote cluster node (over TCP/IP) is completely transparent to the client application.

Coherence for .NET contains the following chapters:

- Chapter 18, "Configuration and Usage for .NET Clients"

- Chapter 19, "Using the Coherence .NET Client Library"

- Chapter 20, "Building Integration Objects for .NET Clients"

- Chapter 21, "Continuous Query Cache for .NET Clients."

- Chapter 22, "Remote Invocation Service for .NET Clients"

- Chapter 23, "Using Network Filters for .NET Clients"

- Chapter 25, "Managing ASP.NET Session State"

- Chapter 26, "Sample Windows Forms Application for .NET Clients"

- Chapter 27, "Sample Web Application for .NET Clients"