Could not include namespace System.Threading.Tasks

Question

I am unable to include System.Threading.Tasks in my project.

I am Using Asp.net 2013 (4.5)

I am getting the following error -

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

I had refered earlier questions and they suggested in 4.0+ versions of ASP.NET it will work fine but I coudnt include it in my project.

Help me thanks.

Answer 1

System.Threading.Tasks.Task is in mscorlib which in .NET4.5. My project is not targeting, so in project properties need to change the target to 4.5.