Facebook.FacebookOAuthClient.GetApiEventArgs C# (CSharp) Method

        private FacebookApiEventArgs GetApiEventArgs(AsyncCompletedEventArgs e, string json, out HttpMethod httpMethod)
        {
            var state = (WebClientStateContainer)e.UserState;
            httpMethod = state.Method;

            var cancelled = e.Cancelled;
            var userState = state.UserState;
            var error = e.Error;

            // Check for Graph Exception
            var webException = error as WebExceptionWrapper;
            if (webException != null)
            {
                error = ExceptionFactory.GetGraphException(webException);
            }

            if (error == null)
            {
                error = ExceptionFactory.CheckForRestException(DomainMaps, state.RequestUri, json) ?? error;
            }

            var args = new FacebookApiEventArgs(error, cancelled, userState, json);
            return args;
        }