android - namespace prefix "myapp" is not defined in Xamarin While Building App? -


i want build toolbar in xamarin app. when want create menu shows me error saying "namespace prefix "myapp" not defined". here code.

<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res/android-auto"> <item android:id="@+id/action_reply"     android:icon="@drawable/ic_action_reply"     android:title="reply"     myapp:showasaction="always" /> <item android:id="@+id/action_undo"     android:icon="@drawable/ic_action_undo"     android:title="undo"     myapp:showasaction="never" /> </menu>

can me code?

why use myapp prefix? use android instead.

<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res/android-auto"> <item android:id="@+id/action_reply"     android:icon="@drawable/ic_action_reply"     android:title="reply"     android:showasaction ="always" /> <item android:id="@+id/action_undo"     android:icon="@drawable/ic_action_undo"     android:title="undo"     android:showasaction ="never" /> </menu>

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