Windows Phone Negative App getting Credentials from All ready Installed Facebook App in WP - facebook

I need a Help From You.
I Developing App with Login Credentials of Facebook. Im working with facebook authentication and it's working Properly.
But we want More Easy way.
If already Windows Phone Facebook App is Installed in my Phone, my App must take the Credentials from that FB App to My App.
Can Any One Help Me How can i do this.

Basically, you could refer to below links to achieve your goal.
https://developers.facebook.com/docs/facebook-login/login-for-windows-phone
http://facebooksdk.net/docs/phone/sso/

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I have a problem to connect facebook app with my app.
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(i only need upload image with some text).
it works well unless facebook app is installed on the device, but if a device has facebook app, it seems like can't get the login information.
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I have an iPhone app using Facebook connect. When I test it on the iPhone simulator, because I don't have facebook application installed on the simulator. It runs the facebook webview and ask me permissions and everything works fine.
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iOS Facebook connect not working when user has FB's app installed? [duplicate]

This question already has answers here:
iOS: Connect to Facebook without leaving the app for authorization
(2 answers)
Closed 2 years ago.
Has anyone else had this problem? I'm getting this error when trying to authorize a user via FB, I think I've isolated it only when a user has installed the Facebook app:
fb_our_appID://authorize#error=unknown%5Ferror
If you delete the FB app from the user's phone, our app will then try to authenticate via Safari, and everything works fine.
Thanks so much.
Yup, we were getting this as well.
It occurs when your bundle identifier does not match the one configured as part of your facebook application. Copy your bundle-id from your plist, and update the iOS Bundle ID value on facebook
https://developers.facebook.com/apps/_YOUR_APP_ID_/summary
PS: Check out facebook.stackoverflow.com for good facebook help.
I got the same issue. I Removed the facebook app from the phone and it started to work again.
I then installed the facebook app and my app kept working.
So looks like it only works fine if the app is installed before the facebook app and leads me to think it is a facebook app problem.
I didn't tried with Safari, but I had the same error message from facebook app.
My problem was from my application bundle, which must be exactly the same as in your facebook app configuration (first field of facebook iOS app configuration).
Make sure your application bundle id is set correctly on your app's Facebook page.
check out this answer
Authentication Fails with Facebook App Installed (iOS)
for reference.