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When canceling a running Task that is doing a network call, an exception is thrown: The object was used after being disposed.
**Steps to Reproduce:**
1. Run the attached sample on an iPhone Simulator
2. Press the only Button multiple times, quickly.
System.ObjectDisposedException: The object was used after being disposed.
at System.Net.WebConnection.EndWrite (System.Net.HttpWebRequest request, Boolean throwOnError, IAsyncResult result) [0x0002c] in //Library/Frameworks/Xamarin.iOS.framework/Versions/188.8.131.52/src/mono/mcs/class/System/System.Net/WebConnection.cs:1071
at System.Net.WebConnectionStream.WriteAsyncCB (IAsyncResult r) [0x00013] in //Library/Frameworks/Xamarin.iOS.framework/Versions/184.108.40.206/src/mono/mcs/class/System/System.Net/WebConnectionStream.cs:458
Full stacktrace here: https://gist.github.com/therealjohn/e8128aef9ea9444e3836
No exceptions and the task is cancelled.
**Build Date & Platform:**
=== Xamarin Studio ===
Version 5.9.4 (build 5)
Installation UUID: e01c3049-a2d2-4e0a-aad8-afe6fb627c4d
Mono 4.0.2 ((detached/c99aa0c)
GTK+ 2.24.23 (Raleigh theme)
Package version: 400020005
=== Xamarin.Android ===
Version: 220.127.116.11 (Business Edition)
Android SDK: /Users/johnmiller/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
2.3 (API level 10)
4.0.3 (API level 15)
4.1 (API level 16)
4.2 (API level 17)
4.4 (API level 19)
5.0 (API level 21)
Java SDK: /usr
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
=== Xamarin Android Player ===
Version: Unknown version
Location: /Applications/Xamarin Android Player.app
=== Apple Developer Tools ===
Xcode 6.3 (7569)
=== Xamarin.iOS ===
Version: 18.104.22.168 (Business Edition)
Build date: 2015-06-30 15:19:13-0400
=== Xamarin.Mac ===
Version: 22.214.171.124 (Business Edition)
=== Build Information ===
Release ID: 509040005
Git revision: 8010a90f6e246b32364e3fb46ef2c9d1be9c9a2b
Build date: 2015-06-08 16:52:06-04
Xamarin addins: 7e93e9c3503f28770f23ce1b7eafd829919f18e8
=== Operating System ===
Mac OS X 10.10.2
I tried to replicate this in a simpler console app (included in the soluton as "ConsoleTest"), but it was not successful so I included the iOS app.
Also stems from this: http://stackoverflow.com/questions/31020937/cancelling-a-task-results-in-objectdisposedexception
*** This bug has been marked as a duplicate of bug 31507 ***