How to fetch phone contact to create group in windows phone8 app -

i developing windows phone 8 application. have create group of contacts using phone contacts , make available access throughout application.

research chooseers , launchers of windows phone:

how use save contact task windows phone

and have also

• how use email compose task windows phone
• how use save phone number task windows phone
• how use phone number chooser task windows phone

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to create group think can serialize , deserialize objects disk (xaml / c #)

hope it's help