Passing data from one page to another page in windows phone apps
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I want to pass value from page1 to page2 and again back that value from page2 to page1,right now i am using query string and using query string i can pass data from page1 to page2 but i cant reverse of that process i.e pass same data from page2 to again page1.
Please help me.
what i can use for this and how?