windows phone 7 app for Salesforce

Question

Hi.
I want to develop windows phone 7 app for doing crud(Create, Retrieve, Update, Delete) operations from salesforce. I'm successfully done an sample app in windows 8 and 8.1 using developerforce toolkit. But for windows phone 7 i'm not getting even toolkit also. Please any one help me for moving forward in developing windows phone 7 app. Thanks in advance.