After updating Visual Studio Community 2019 to 16.6.0 i am getting this error help me please :
No Launchable Activity: This project does not contain any activities marked MainLauncher. It has been deployed to the device, but no activity will be launched.
To mark an activity as launchable, add the [Activity] attribute to it with MainLauncher = true:
[Activity (MainLauncher = true)]
public class MyActivity : Activity