How to draw polygons on canvas using mouse events?

Hello members of stackoverflow, I'm approaching WPF drawing world (using .NET 4.5 and VS2013) and I'm struggling with the following question: I'd like to draw a polygon on a canvas using mouse click/move events. On the web I saw some static examples(i.e. points carved in XAML/C# code), using WebForms or GDI but that doesn't suites my needs. It would be great if someone could provide a simple example, no need for the fancy stuff (like moving or resizig the polygon).