AspNetSynchronizationContext

by

Am I correct that It does guarantee your continuations will get the same HttpContext.Current as original callers? It does not guarantee the continuations will execute on the same thread as the callers?

Yes, HttpContext.Current is preserved, and yes, the continuations may execute on a different thread.

I mean principal/culture associated with the thread and thread local storage? That’s important because ASP.NET localization relies on thread’s culture and my application relies on .NET role security model (thread’s principal).

Ordinary thread-local storage is lost. You can mitigate this by using LogicalCallContext (which flows with ExecutionContext), but with async it’s easier to just reference the variables directly.

Principal is always preserved; to do otherwise would be a security risk. This flows with ExecutionContext.

I believe that culture flows with AspNetSynchronizationContext, but I haven’t tested this out on .NET 4.5’s new implementation.

You may find my MSDN article on SynchronizationContext helpful. It’s not official documentation (I don’t work for Microsoft), but at least it’s something. Note that the AspNetSynchronizationContext referenced in that article is now called LegacyAspNetSynchronizationContext in .NET 4.5.

Another great resource is Stephen Toub’s ExecutionContext vs. SynchronizationContext.

More Related Contents:

  1. Fire and forget async method in asp.net mvc
  2. How to Async Files.ReadAllLines and await for results?
  3. call async method without await #2
  4. What is the best way to read/parse the XML files [closed]
  5. How and when to use ‘async’ and ‘await’
  6. ASP.NET Web Site or ASP.NET Web Application?
  7. How would I run an async Task method synchronously?
  8. MVC3 and Entity Framework
  9. Using async/await for multiple tasks
  10. How do yield and await implement flow of control in .NET?
  11. What is the App_Data folder used for in Visual Studio?
  12. Disable Session state per-request in ASP.Net MVC
  13. How serious is this new ASP.NET security vulnerability and how can I workaround it?
  14. ASP.NET Web API OperationCanceledException when browser cancels the request
  15. Enforce an async method to be called once
  16. Why use Async/await all the way down
  17. What perfmon counters are useful for identifying ASP.NET bottlenecks?
  18. Global ASAX – get the server name
  19. What’s the meaning of “UseTaskFriendlySynchronizationContext”?
  20. Different forms of the WCF service contract interface
  21. Difference between Html.RenderAction and Html.Action
  22. In ASP.NET, when should I use Session.Clear() rather than Session.Abandon()?
  23. Should I worry about “This async method lacks ‘await’ operators and will run synchronously” warning
  24. Web API Queryable – how to apply AutoMapper?
  25. Async thread body loop, It just works, but how?
  26. The configuration section ‘system.web.extensions’ cannot be read because it is missing a section declaration
  27. How do you implement an async action delegate method?
  28. aspnet_compiler finding wrong version of System.Web.WebPages 1.0.0.0 instead of 2.0.0.0
  29. All requests to ASP.NET Web API return 404 error
  30. Timeout pattern on task-based asynchronous method in C#

Leave a Comment