如何在xamarin表单中移动右侧搜索栏的搜索图标

SearchBar searchBar = new SearchBar
{
    Placeholder = "搜索",
    HorizontalOptions = LayoutOptions.FillAndExpand
};

ControlTemplate searchBarTemplate = new ControlTemplate(typeof(SearchBar));

searchBarTemplate.SetBinding(SearchBar.IconProperty, new Binding("SearchIcon"));

searchBar.Template = searchBarTemplate;

ControlTemplate searchBarTemplate = new ControlTemplate(typeof(SearchBar));

Grid grid = new Grid();
grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
grid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });

Image searchIcon = new Image
{
    Source = "search_icon.png",
    VerticalOptions = LayoutOptions.Center,
    HorizontalOptions = LayoutOptions.End
};

Entry searchEntry = new Entry
{
    Placeholder = "搜索",
    HorizontalOptions = LayoutOptions.FillAndExpand
};

grid.Children.Add(searchEntry);
grid.Children.Add(searchIcon, 1, 0);

searchBarTemplate.VisualTree = grid;

searchBar.Template = searchBarTemplate;