android - How to prevent Up Navigation in Xamarin - 


[activity(label = "@string/addstoryselectclassactivity_label", screenorientation = screenorientation.portrait, parentactivity=typeof(feedlistactivity))] [metadata("android.support.parent_activity", value = "educaandroid.feedlistactivity")]

after adding parentactivity flag activity in xamarin, activity has start showing navigation on screen. how can prevent ?

after looking couple of class founded disabling navigation on here 

actionbar.setdisplayhomeasupenabled (false);

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