I am a newbie in Xamarin with Visual Studio 2015. I have created project with Android Support V4 and V7 earlier, and it's work fine. But after i add components from Google Play Service MAP, then all my V4 objects get errors. For instance my drawer layout, this is the error :
Severity Code Description Project File Line Suppression State Error CS0433 The type 'DrawerLayout' exists in both 'Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' and 'Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' gtSMobileAndroid 
\Source_eMedWeb\gotoSehat\gtSMobileAndroid\gtSMobileAndroid\MainActivity.cs 20 Active
I have done many things to recover, deleting all packages and reinstall the components, but still i get this error.
Please advice.............thank you very much in advance.......