How to set Centered image in toolbar in xamarin forms

I tried to put image aligned center in toolbar "toolbarlogo" .. how can i do that

  <TabbedPage.ToolbarItems>
        <ToolbarItem  Name="MenuItem1" Order="Primary" Icon="cart" Command="{Binding GoToCart}" Priority="3" />
        <ToolbarItem  Name="MenuItem2" Order="Primary" Icon="search" Command="{Binding GotoSearch}" Priority="2" />

        <ToolbarItem  Name="MenuItem3" Order="Primary" IsEnabled="False" Icon="toolbarlogo" Priority="0" />

    </TabbedPage.ToolbarItems>