Today I suggest a GREAT articole to work on Silverlight Data visualization toolkit.
The Silverlight Dava visualization toolkit is usable also with WP7 – WP8 (with some trick)
You need these dll:
(Download it from here or copy it from silverlight 3 folder)
Add it to the project.
You’ll receive some warning compatibilty message and some HRESULT error in blend designer but all chart is available
Ok now you can use all Data visualization toolkit features