c# - Xamarin: How to get a phone number? -

i'm writing test application, on xamarin android. need know phone number. tried lot of options. last:

        [assembly: xamarin.forms.dependency(typeof(phonenumberservice))]     public string getmyphonenumber()     {         telephonymanager mgr = application.context.getsystemservice(context.telephonyservice) telephonymanager;         return mgr.line1number;     } 

assemblyinfo.cs:

<`uses-permission android:name="android.permission.read_phone_state"/>` 

androidmanifest.xml:

 [assembly: usespermission(android.manifest.permission.readphonestate)] 

on emulator works on phone not work. returns empty string.

how phone number?

to solve these problems,this link might you

try that:

            telephonymanager mtelephonymgr;              mtelephonymgr = (telephonymanager)getsystemservice(telephonyservice);              var number = mtelephonymgr.line1number;