private void ActiveAdminDevice()
        {
            bool isAdmin = Dpm.IsAdminActive(ComDeviceAdmin);

            if (!isAdmin)
            {
                Intent intent = new Intent(DevicePolicyManager.ActionAddDeviceAdmin);
                intent.PutExtra(DevicePolicyManager.ExtraDeviceAdmin, ComDeviceAdmin);
                intent.PutExtra(DevicePolicyManager.ExtraAddExplanation, "Device administrator");
                Context.StartActivity(intent);
            }
        }
 private void Lock()
 {
     Dpm.LockNow();
 }