C# 클래스 Facebook.Graph.Web.Mvc.VerifyFacebookSignatureFilterAttribute
Provides functionality for verifying a Facebook signature.
Apply this attribute to a Canvas page action method to verify that the action is being initiated via Facebook's server. Alternatively, you may apply the FacebookStatusFilterAttribute to the method to obtain information about the user currently using the Canvas page. If the user is not actually on a Facebook Canvas page, an OAuthException will be thrown prior to invoking the method.