在 Xamarin 中选择集合视图项时如何禁用颜色

如何解决在 Xamarin 中选择集合视图项时如何禁用颜色

作为主题状态，我使用的是 mvvm 并且我不希望某个项目在被选中后突出显示。下面是我的代码。我遇到的问题是它一直突出显示所选项目。请帮忙

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 <CollectionView ItemsSource="{Binding CategoriesCollection}"                           
                                   Margin="10,20"
                                   HeightRequest="130"
                                   VerticalOptions="FillAndExpand"
                                   HorizontalScrollBarVisibility="Never" 
                                   ItemsLayout="horizontallist" 
                                   Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="3"
                                   SelectionMode="Single"
                                   SelectedItem="{Binding SelectedCategory,Mode=TwoWay}"
                                   SelectionChangedCommand="{Binding MonkeySelectionChangedCommand}">

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  private async void GetSelectedCategory()
        {            

            var currentSelection = SelectedCategory as Category;
            if (SelectedCategory == null) return;         
            var navigationParamaters = new NavigationParameters();
            navigationParamaters.Add("categoryDetail",SelectedCategory);
            await NavigationService.NavigateAsync("ProductListPage",navigationParamaters);
            SelectedCategory = null;
                                           
        }