TapGesture gives error!!

            <Image Source="Corporational.png" HorizontalOptions="Center">
                <Image.GestureRecognizers>
                    <TapGestureRecognizer Tapped="CorporateRecognizer_Tapped">
                        <TapGestureRecognizer.CommandParameter>
                            <x:Boolean>True</x:Boolean>
                        </TapGestureRecognizer.CommandParameter>
                    </TapGestureRecognizer>

                </Image.GestureRecognizers>

            </Image>
            <Label Text="Kurumsal Müşteri" FontSize="Large" VerticalTextAlignment="Start" HorizontalTextAlignment="Center"  Grid.Row="1"></Label>

        </Grid>

My Method:

 private void CorporateRecognizer_Tapped(object sender, EventArgs e)
    {

        Navigation.PopAsync(new Page1());

    }

PopAsync gives error in here: Argument 1 :Cannot Convert from Page1 to bool

Why is it giving error?