how to close android app completely

Question

I created an android application with a logout option in onCreateOptionsMenu. The Logout works perfectly but when I press the back button again it takes me to t

Answer 1

For Xamarin Users:

int pid = Android.OS.Process.MyPid();
Android.OS.Process.KillProcess(pid);

put it in your OnDestroy() function.

Edit:

After investigating it thoroughly, I found out that even the above code I wrote does not "Kill" the app totally (deleting it from task manager - "recent apps"). Eventually, after a lot of code tryouts, I managed to figure something out, Overriding "Finish" functions with this code:

public override void Finish()
    {
        if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)
        {
            base.FinishAndRemoveTask();
        }
        else
        {
            base.Finish();
        }
    }

this is the sole solution for that question!