Facebook.FacebookClient.BatchAsync C# (CSharp) Method

        public virtual void BatchAsync(FacebookBatchParameter[] batchParameters)
        {
            BatchAsync(batchParameters, null);
        }

        /// <summary>
        /// Executes a batch request asynchronously.
        /// </summary>
        /// <param name="facebookClient">The facebook client.</param>
        /// <param name="batchParameters">The batch parameters.</param>
        /// <returns>The task of the result.</returns>
        public static Task <object> BatchTaskAsync(this FacebookClient facebookClient, params FacebookBatchParameter[] batchParameters)
        {
            Contract.Requires(batchParameters != null);
            Contract.Requires(batchParameters.Length > 0);

            var tcs = CreateSource <object>(null);

            EventHandler <FacebookApiEventArgs> handler = null;

            handler = (sender, e) => TransferCompletionToTask <object>(tcs, e, () => e.GetResultData(), () => facebookClient.PostCompleted -= handler);

            facebookClient.PostCompleted += handler;

            try
            {
                facebookClient.BatchAsync(batchParameters, tcs);
            }
            catch
            {
                facebookClient.PostCompleted -= handler;
                tcs.TrySetCanceled();
                throw;
            }

            return(tcs.Task);
        }