<Grid Grid.Column="1" HorizontalAlignment="Left" Height="378" Margin="10,41,0,0" Grid.Row="2" VerticalAlignment="Top" Width="600">
                    <maps:Map  x:Name="myMap"

                   ZoomLevel="7.5" Credentials="xxxxx"

                   Margin="-73,-154,0,0">
                        <maps:Map.Center>
                            <maps:Location Latitude="xxx" Longitude="xxx" />
                        </maps:Map.Center>

                    </maps:Map>
                </Grid>

private Place _selectedPlace;

        public Place SelectedPlace
        {
            get { return _selectedPlace; }
            set
            {
                _selectedPlace = value;
                ShowPushPin(_selectedPlace);
                RaisePropertyChanged("SelectedPlace");

            }

        }

        public async void ShowPushPin(Place place)
        {
            //Here i would like code that places the pushpin.
            // Place has properties for long/lat

        }