How to Integrate Unity 3D code with WPF?

I have made a simple unity project by importing a .fbx image kept in assets folder,and I have attached a c# script to this image in which I have included the code to rotate .fbx image on the basis of arrow keys pressed in keyboard.Now I want to integrate this particular sample made in Unity with WPF such as,when a button is pressed in wpf the tshirt appears and when I press keyboard keys the tshirt starts rotating,i am new to unity please tell me step by step method to integrate Unity code to WPF.

Here is a good starting place: