.net - How to use sharepoint in c#? -

i have sharepoint site containing group of people. in wpf application required use sharepoint group information authentication. how started on using sharepoint class (if any) in c#?

depending on want accomplish, may want start grabbing dlls microsoft.sharepoint.client.dll , microsoft.sharepoint.client.runtime.dll 1 of sharepoint servers, in:

c:\program files\common files\microsoft shared\web server extensions\14\isapi 

these allow connect sharepoint farm using client object model (csom).

more here