SharePoint 2010 provides a new client object model that enables you to create SharePoint solutions that run remotely from the SharePoint server farm. For example, the client object model enables you to consume and manipulate SharePoint data in Windows Forms applications, Windows Presentation Framework application, console applications, Silverlight applications, and ASP.NET Web applications.
For working with client object model you need to get two master dlls:
These dlls you can find under following path from machine on which you have installed SharePoint 2010.
Path to get DLL’s: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\ISAPI
The SharePoint Foundation 2010 managed client object model consists of two assemblies that contain five namespaces. If you look at the classes available in those namespaces, you see many classes. Primarily classes that have direct counterparts to some familiar classes in the SharePoint Foundation server object model.
Following table shows you Client Side classes those are similar to Server Object Model:
Client Object Model Classes Server Object Model Classes
Conclusion: The above code snippets and detail description will help you to understand Client Object Model to begin with SharePoint 2010.