System.Net.FtpDataStream.EndRead C# (CSharp) Method

        public override int EndRead(IAsyncResult ar)
        {
            try
            {
                object result = ((LazyAsyncResult)ar).InternalWaitForCompletion();

                if (result is Exception)
                    throw (Exception)result;

                return (int)result;
            }
            finally
            {
                CheckError();
            }
        }