But for the Community Server, I have no idea how to add a web reference to a web service since I only have (.aspx, .master and bin dll) files in the server. If anybody know how to use webservice in Community Server, please help me.
You'll most likely need to download the SDK from http://get.communityserver.org/download/moredownloads.aspx, instead of using the Windows or Web install versions of CS.
CS Documentation - now available in downloadable PDF form
My CS Site
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