passing cookie to my webbrowser

I m trying to develop an app for WP7 in Visual Studio 2010 in C#. I have a specific use case. I want to upload some photos to a website which hosts photos. First I launch the webbrowser to authenticate once I get authenticated I select a particular picture and upload it. after that I m trying to launch the browser it should automatically login with the credentials passed earlier. I have tried some methods but did not work. So here is my requirement

1) I want to store the login credentials ente开发者_如何学编程red to my web browser using a cookie or a file.

2) I want to pass the same credentials to the webbrowser when its launched again after sometime.

Please help me to solve this issue.

Thanks in advance

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Why don't you just keep your browser open? You can get the cookies using the GetCookies method, but it doesn't seem to be a way of setting them back.