MarkupExtension not found for d:DesignInstance

So I’m trying to use the extension in Rider and I get an exception when I land on a page that has d:DesignInstance.

LiveXAML had a similar issue that they had to fix

The issue goes away if I enable XamlC, however then HotReload quits working.

EXCEPTION: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Xamarin.Forms.Xaml.XamlParseException: Position 16:17. MarkupExtension not found for d:DesignInstance
  at Xamarin.Forms.Xaml.CreateValuesVisitor.Visit (Xamarin.Forms.Xaml.ElementNode node, Xamarin.Forms.Xaml.INode parentNode) [0x00359] in D:\a\1\s\Xamarin.Forms.Xaml\CreateValuesVisitor.cs:103 
  at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x000ac] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:149 
  at Xamarin.Forms.Xaml.ListNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00025] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:226 
  at Xamarin.Forms.Xaml.RootNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00044] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:200 
  at Xamarin.Forms.Xaml.XamlLoader.Visit (Xamarin.Forms.Xaml.RootNode rootnode, Xamarin.Forms.Xaml.HydrationContext visitorContext, System.Boolean useDesignProperties) [0x00064] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:148 
  at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.String xaml, System.Boolean useDesignProperties) [0x00058] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:91 
  at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.Type callingType) [0x00028] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:69 
  at Xamarin.Forms.Xaml.Extensions.LoadFromXaml[TXaml] (TXaml view, System.Type callingType) [0x00000] in D:\a\1\s\Xamarin.Forms.Xaml\ViewExtensions.cs:36 
  at MyApp.Mobile.MyProject.Pages.TabNavPage.InitializeComponent () [0x00001] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject/obj/Debug/netstandard2.0/Pages/TabNavPage.xaml.g.cs:21 
  at MyApp.Mobile.MyProject.Pages.TabNavPage..ctor () [0x00013] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject/Pages/TabNavPage.xaml.cs:16 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod.InternalInvoke(System.Reflection.MonoCMethod,object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/System.Reflection/MonoMethod.cs:698 
   --- End of inner exception stack trace ---
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00015] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/System.Reflection/MonoMethod.cs:704 
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic, System.Boolean wrapExceptions) [0x000a8] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/ReferenceSources/RuntimeType.cs:179 
  at System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean wrapExceptions, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x00009] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/ReferenceSources/RuntimeType.cs:153 
  at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Boolean wrapExceptions, System.Threading.StackCrawlMark& stackMark) [0x00027] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/rttype.cs:5646 
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic, System.Boolean wrapExceptions) [0x00039] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/activator.cs:206 
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/activator.cs:190 
  at System.Activator.CreateInstance (System.Type type) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/activator.cs:134 
  at MyApp.Mobile.MyProject.Core.Services.Navigation.NavigationService+<>c__DisplayClass19_0.<InitializePage>b__1 () [0x00000] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Services/Navigation/NavigationService.cs:148 
  at MyApp.Mobile.MyProject.Core.Helpers.Performance+<>c__DisplayClass8_0`1[T].<Measure>b__0 () [0x00001] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Helpers/Performance.cs:24 
  at MyApp.Mobile.MyProject.Core.Helpers.Performance.Measure (System.String title, System.Action action, System.String callerName) [0x00019] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Helpers/Performance.cs:36 
  at MyApp.Mobile.MyProject.Core.Helpers.Performance.Measure[T] (System.String title, System.Func`1[TResult] func, System.String callerName) [0x0001a] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Helpers/Performance.cs:22 
  at MyApp.Mobile.MyProject.Core.Services.Navigation.NavigationService.InitializePage (System.String pageKey, MyApp.Mobile.MyProject.Core.Interfaces.IViewModel viewModel, MyApp.Mobile.MyProject.Core.Services.Navigation.NavigationParameters parameters) [0x00089] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Services/Navigation/NavigationService.cs:148 
  at MyApp.Mobile.MyProject.Core.Services.Navigation.NavigationService.NavigateTo (System.String pageKey, MyApp.Mobile.MyProject.Core.Interfaces.IViewModel viewModel, MyApp.Mobile.MyProject.Core.Services.Navigation.NavigationParameters parameters) [0x00045] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Services/Navigation/NavigationService.cs:127 
  at MyApp.Mobile.MyProject.Core.Services.Navigation.NavigationService.NavigateTo (System.String pageKey, MyApp.Mobile.MyProject.Core.Interfaces.IViewModel viewModel) [0x0002d] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject.Core/Services/Navigation/NavigationService.cs:119 
  at MyApp.Mobile.MyProject.ViewModels.MainViewModel.<OnSignInCommand>b__31_0 () [0x00201] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject/ViewModels/MainViewModel.cs:158 
  at MyApp.Mobile.MyProject.ViewModels.BaseViewModel.RunSafeAsync (System.Func`1[TResult] task, System.Action`1[T] handleErrorAction) [0x00041] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject/ViewModels/Base/BaseViewModel.cs:297 . Priority: High. Timestamp:2019-06-28 13:37:02Z.
EXCEPTION: Xamarin.Forms.Xaml.XamlParseException: Position 16:17. MarkupExtension not found for d:DesignInstance
  at Xamarin.Forms.Xaml.CreateValuesVisitor.Visit (Xamarin.Forms.Xaml.ElementNode node, Xamarin.Forms.Xaml.INode parentNode) [0x00359] in D:\a\1\s\Xamarin.Forms.Xaml\CreateValuesVisitor.cs:103 
  at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x000ac] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:149 
  at Xamarin.Forms.Xaml.ListNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00025] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:226 
  at Xamarin.Forms.Xaml.RootNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00044] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:200 
  at Xamarin.Forms.Xaml.XamlLoader.Visit (Xamarin.Forms.Xaml.RootNode rootnode, Xamarin.Forms.Xaml.HydrationContext visitorContext, System.Boolean useDesignProperties) [0x00064] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:148 
  at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.String xaml, System.Boolean useDesignProperties) [0x00058] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:91 
  at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.Type callingType) [0x00028] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:69 
  at Xamarin.Forms.Xaml.Extensions.LoadFromXaml[TXaml] (TXaml view, System.Type callingType) [0x00000] in D:\a\1\s\Xamarin.Forms.Xaml\ViewExtensions.cs:36 
  at MyApp.Mobile.MyProject.Pages.TabNavPage.InitializeComponent () [0x00001] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject/obj/Debug/netstandard2.0/Pages/TabNavPage.xaml.g.cs:21 
  at MyApp.Mobile.MyProject.Pages.TabNavPage..ctor () [0x00013] in /Users/chaseflorell/Projects/MyApp/MyApp.Mobile.MyProject/MyApp.Mobile.MyProject/Pages/TabNavPage.xaml.cs:16 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod.InternalInvoke(System.Reflection.MonoCMethod,object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/System.Reflection/MonoMethod.cs:698 . Priority: High. Timestamp:2019-06-28 13:37:02Z.

[ChaseFlorell]

there’s a lot of custom controls and such in there, sorry 😦 I’ll give you whatever I can though.

<?xml version="1.0" encoding="utf-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
                xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                xmlns:pages="clr-namespace:MyCompany.Mobile.MyProduct.Pages;assembly=MyCompany.Mobile.MyProduct"
                xmlns:helpers="clr-namespace:MyCompany.Mobile.MyProduct.Helpers;assembly=MyCompany.Mobile.MyProduct"
                xmlns:xaml="clr-namespace:MyCompany.Mobile.MyProduct.Xaml;assembly=MyCompany.Mobile.MyProduct"
                xmlns:behaviors="clr-namespace:MyCompany.Mobile.MyProduct.Behaviors;assembly=MyCompany.Mobile.MyProduct"
                xmlns:controlTemplates="clr-namespace:MyCompany.Mobile.MyProduct.Templates.ControlTemplates;assembly=MyCompany.Mobile.MyProduct"
                xmlns:cells="clr-namespace:MyCompany.Mobile.MyProduct.Cells;assembly=MyCompany.Mobile.MyProduct"
                xmlns:converters="clr-namespace:MyCompany.Mobile.MyProduct.Converters;assembly=MyCompany.Mobile.MyProduct"
                xmlns:controls="clr-namespace:MyCompany.Mobile.MyProduct.Controls;assembly=MyCompany.Mobile.MyProduct"
                xmlns:viewModels="clr-namespace:MyCompany.Mobile.MyProduct.ViewModels"
                x:Class="MyCompany.Mobile.MyProduct.Pages.ActivityListPage"
                d:DataContext="{d:DesignInstance d:Type=viewModels:ActivityListViewModel, IsDesignTimeCreatable=True}"
                mc:Ignorable="d" 
                Title="{Binding Title}">
    <pages:BasePage.Resources>
        <ResourceDictionary>
            <converters:TappedItemEventArgsToTappedItemConverter x:Key="TappedItemConverter" />
            <converters:FormattedDateConverter x:Key="FormattedDateConverter" />
        </ResourceDictionary>
    </pages:BasePage.Resources>
    <pages:BasePage.ToolbarItems>
        <ToolbarItem Command="{Binding GoToActivityFilterPageCommand}" >
            <ToolbarItem.IconImageSource>
                <controls:ExFontImageSource FontIcon="{x:Static xaml:Icons.fcc_filter}" Color="{StaticResource White}" Size="20"/>
            </ToolbarItem.IconImageSource>
        </ToolbarItem>
        <ToolbarItem Command="{Binding ShowActivityActionSheetCommand}" >
            <ToolbarItem.IconImageSource>
                <controls:ExFontImageSource FontIcon="{x:Static xaml:Icons.fcc_circle_plus}" Color="{StaticResource White}" Size="20"/>
            </ToolbarItem.IconImageSource>
        </ToolbarItem>
    </pages:BasePage.ToolbarItems>
    <ListView HasUnevenRows="True"
              BackgroundColor="Transparent"
              CachingStrategy="RecycleElement"
              SeparatorColor="{StaticResource SharkWithAlpha}"
              IsPullToRefreshEnabled="true"
              IsRefreshing="{Binding IsBusy}"
              RefreshCommand="{Binding RefreshCommand}"
              ItemsSource="{Binding VisibleDataObjectCollection}">
        <ListView.Behaviors>
            <behaviors:InfiniteLoadBehavior />
            <behaviors:EventToCommandBehavior Command="{Binding ShowDetailsCommand}" 
                                              EventName="ItemTapped"
                                              Converter="{StaticResource TappedItemConverter}" />
        </ListView.Behaviors>
        <ListView.ItemTemplate>
            <DataTemplate>
                <cells:ExViewCell>
                    <controlTemplates:ThreeRowListItemTemplate VerticalOptions="Fill" 
                                                               HorizontalOptions="Fill"
                                                               PrimaryText="{Binding Title}"
                                                               SecondaryText="{Binding MyProductName}"
                                                               TertiaryText="{Binding StartDate, Converter={StaticResource FormattedDateConverter}}" />
                </cells:ExViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
        <ListView.Header>
            <ContentView Padding="3" />
        </ListView.Header>
        <ListView.Footer>
            <Grid>
                <controlTemplates:EmptyDataTemplate Text="{helpers:Translate ActivityListPage_ListEmptyMessage}" 
                                                  IsVisible="{Binding ShowNoDataWarning}">
                    <controlTemplates:EmptyDataTemplate.Triggers>
                        <DataTrigger TargetType="controlTemplates:EmptyDataTemplate" Binding="{Binding IsLoadingPage}" Value="True">
                            <Setter Property="IsVisible" Value="False"/>
                        </DataTrigger>
                    </controlTemplates:EmptyDataTemplate.Triggers>
                </controlTemplates:EmptyDataTemplate>
                <Button Text="{helpers:Translate ActivityListPage_ClearFilter}"
                      Style="{StaticResource TextOnlyButton}"
                      IsVisible="{Binding HasFiltersApplied}"
                      Command="{Binding ClearFiltersCommand}" >
                    <Button.Triggers>
                        <DataTrigger TargetType="Button" Binding="{Binding IsLoadingPage}" Value="True">
                            <Setter Property="IsVisible" Value="False"/>
                        </DataTrigger>
                    </Button.Triggers>
                </Button>
                <ActivityIndicator HorizontalOptions="Center" 
                                   VerticalOptions="Center" 
                                   Color="{StaticResource PrussianBlue}"
                                   IsRunning="{Binding IsLoadingPage}"
                                   IsVisible="{Binding IsLoadingPage}"/>
            </Grid>
        </ListView.Footer>
    </ListView>
</ContentPage>

[AndreiMisiukevich]

unfortunately it won’t be fixed since it’s XF bug