Commented Issue: PushstreamContent in Win8 App is not working [324]

I am hitting an issue with using PushStreamContent in the Windows store app. I don’t see the same issue in the traditional console app though.

It’s a simple scenario where I am ‘POST’ing some small data to a service using PushStreamContent as below.

HttpClient client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Post, "http://.../SimpleMvcWebAPIApplication/api/values");
request.Content = new PushStreamContent((stream, httpContent, transportContext) =>
{
using (var streamWriter = new StreamWriter(stream))
{
string data = "\"hello world\"";
streamWriter.Write(data);
streamWriter.Flush();
}
}, "application/json");

var response = await client.SendAsync(request);
response.EnsureSuccessStatusCode();

It fails as below.

System.ObjectDisposedException was unhandled by user code
HResult=-2146232798
Message=Cannot access a closed Stream.
Source=mscorlib
ObjectName=""
StackTrace:
at System.IO.__Error.StreamIsClosed()
at System.IO.MemoryStream.Seek(Int64 offset, SeekOrigin loc)
at System.Net.Http.HttpContent.<>c__DisplayClassf.<LoadIntoBufferAsync>b__d(Task copyTask)
--- 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.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at App5.App.<SimpleWebAPIService_Write_Temp1>d__f.MoveNext() in c:\personal\maying\WinRT\client\WinRTClient\App.xaml.cs:line 368
InnerException:

Comments: I do not agree with the resolution. We need to indeed close the stream to signal pushstreamcontent that we are done writing to the stream. Also, this same piece of code works in a regular console application which indicates that the code is fine. I was able to repro this issue in a windows store app.