Replacing methods that use backgroundworker to async / tpl (.NET 4.0)

Question

My questions are many. Since I saw. NET 4.5, I was very impressed. Unfortunately all my projects are .NET 4.0 and I am not thinking about migrating. So I would like to simplify

Answer 1

A few months have passed, but could this help you?
Using async/await without .NET Framework 4.5