System.Net.Cache.SingleItemRequestCache.ReadOnlyStream.EndRead C# (CSharp) Method

            public override int EndRead(IAsyncResult asyncResult)
            {
                if (asyncResult == null)
                    throw new ArgumentNullException("asyncResult");
                LazyAsyncResult ar = (LazyAsyncResult) asyncResult;
                if (ar.EndCalled) throw new InvalidOperationException(SR.GetString(SR.net_io_invalidendcall, "EndRead"));
                ar.EndCalled = true;
                return (int)ar.InternalWaitForCompletion();
            }