System.Net.Http.ResponseStream.WriteAsync C# (CSharp) Метод

        public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
        {
            VerifyBuffer(buffer, offset, count, allowEmpty: true);
            if (cancellationToken.IsCancellationRequested)
            {
                var tcs = new TaskCompletionSource<object>();
                tcs.TrySetCanceled();
                return tcs.Task;
            }

            Write(buffer, offset, count);
            return Task.FromResult<object>(null);
        }