xamarin.android - android.permission.ACCESS_NETWORK_STATE not recognised -

i have project checks network connectivity state this:

public void getstatus () {     connectivitymanager omanager;     connectivitystate estate;     //     omanager = (connectivitymanager)m_ocontext.getsystemservice (activity.connectivityservice);     //     if (omanager.activenetworkinfo == null)         connected = false;     else         connected = omanager.activenetworkinfo.isconnected;     //     // current connection state     if (!connected)          estate = connectivitystate.notconnected;     else if (omanager.getnetworkinfo (connectivitytype.mobile).getstate () == networkinfo.state.connected)          estate = connectivitystate.roaming;     else if (omanager.getnetworkinfo (connectivitytype.wifi).getstate () == networkinfo.state.connected)         estate = connectivitystate.wifi;     else         estate = connectivitystate.other;     //     state = estate;     //     if (statusupdated != null)         statusupdated (); } 

this worked fine when running xamarin studio, i've moved project on visual studio 2012 doesn't pick permission set in manifest. here's have in manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installlocation="auto" package="myapp.android">     <uses-sdk android:targetsdkversion="10" android:minsdkversion="10" />     <uses-permission android:name="android.permission.access_network_state" />     <application android:label="my app"></application> </manifest> 

i created manifest file going properties of solution , choosing create there, checked checkbox access_network_state yet still when run vs2012 exception saying device doesn't have permission. on this? thanks.