Getting ReadTimeOut Exception while returning PDF from controller to view

I want to download pdf when the user clicks on print button.

My controller method:

[System.Web.Http.HttpGet]
        public FileStreamResult CreatePDF()
        {
            MemoryStream workStream = new MemoryStream();
            Document document = new Document();
            PdfWriter.GetInstance(document, workStream).CloseStream = false;

            document.Open();
            document.Add(new Paragraph("Hello World"));
            document.Add(new Paragraph(DateTime.Now.ToString()));
            document.Close();

            byte[] byteInfo = workStream.ToArray();
            workStream.Write(byteInfo, 0, byteInfo.Length);
            workStream.Position = 0;

            return new FileStreamResult(workStream, "application/pdf");
        }

And here's how I am calling it from view:

 $('#print').click(function (evt) {
                window.location.href = "/api/pdfdownload/createpdf";
            });

I am getting the following error upon clicking the print button:

The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'. System.InvalidOperationException An error has occurred. Error getting value from 'ReadTimeout' on 'System.IO.MemoryStream'. Newtonsoft.Json.JsonSerializationException at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType) at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding) at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.WebHost.HttpControllerHandler.d__1b.MoveNext() An error has occurred. Timeouts are not supported on this stream. System.InvalidOperationException at System.IO.Stream.get_ReadTimeout() at GetReadTimeout(Object ) at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)

I just dont understand what this exception means in this context. Will appreciate your help.