System.Threading.Task Is not working

Question

System.Threading.Tasks is not Working in my project. I has been trying to use All DLL regarded This error
I Search various Code But Did not Get Any Solution

I am Using Asp.net 2008 (3.5)

Error show here -

The type or namespace name 'Tasks' does not exist in the namespace 'System.Threading' (are you missing an assembly reference?)

so help me thanks

Answer 1

This library is not available in .NET 3.5, make sure that you are targeting .NET 4.0 in your project properties.

Ref: http://msdn.microsoft.com/library/system.threading.tasks.aspx

Answer 2

The correct class (and namespace) name is System.Threading.Tasks.Task which is located in mscorlib.dll and is available in .NET 4+. If you want to use it in .NET 3.5, you can do this by using Microsoft Reactive Extensions.