How to handle the Theme support in the SfStepProgressbar control

<ContentPage.Resources>

        <syncCore:SyncfusionThemeDictionary>

            <syncCore:SyncfusionThemeDictionary.MergedDictionaries>

                <syncCore:DarkTheme />

            </syncCore:SyncfusionThemeDictionary.MergedDictionaries>

        </syncCore:SyncfusionThemeDictionary>

    </ContentPage.Resources>

    <StackLayout x:Name="stack">

        <progressBar:SfStepProgressBar Orientation="Vertical" VerticalOptions="FillAndExpand">

            <progressBar:StepView PrimaryText="Step 1" />

            <progressBar:StepView PrimaryText="Step 2" />

            <progressBar:StepView PrimaryText="Step 3" />

            <progressBar:StepView PrimaryText="Step 4" Status="InProgress" />

            <progressBar:StepView PrimaryText="Step 5" />

        </progressBar:SfStepProgressBar>

        <StackLayout HorizontalOptions="CenterAndExpand">

            <StackLayout Orientation="Horizontal">

                <Label x:Name="darkLabel" Text="Dark" />

                <Switch Toggled="Handle_Toggled" />

                <Label x:Name="lightLabel" Text="Light" />

            </StackLayout>

        </StackLayout>

    </StackLayout>

private void Handle_Toggled(object sender, ToggledEventArgs e)

        {

            var pageResources = Resources;

            var mergedDictionaries = (pageResources as SyncfusionThemeDictionary)?.MergedDictionaries;

            if (mergedDictionaries != null)

            {

                foreach (var item in mergedDictionaries.Reverse<ResourceDictionary>())

                {

                    var dictionary = item as ResourceDictionary;

                    if (dictionary.ContainsKey("SyncfusionTheme"))

                    {

                        var themeType = dictionary["SyncfusionTheme"] as string;

                        mergedDictionaries.Remove(item);

                        //Remove theing dark theme and apply the Light theme. applied

                        if (themeType == "DarkTheme")

                        {

                            mergedDictionaries.Add(new LightTheme());

                        }

                        //Remove theing light theme and apply the dark theme. applied

                        else

                        {

                            Resources["SfRichTextEditorFontColor"] = Color.FromHex("#FF5722");

                            mergedDictionaries.Add(new DarkTheme());

                        }

                    }

                }

            }

        }