Preprocessed xaml files aren't used with Visual Studio 2017

[kekekeks]

I can clearly see that obj/Debug/preprocessedxaml contains files with proper changes, but for some reason I still get MarkupExtension not found for d:DesignInstance error.

[dfyx]

I had the same problem and after I upgraded to the following setup, it works:

• Visual Studio 2017 (15.2)
• netstandard1.4
• Xamarin.Forms 2.3.4.231
• xcc 1.0.9

[powerdude]

starting to see this error after upgrading to VS 2017 (15.3) and changing project to .netstandard project.

[KarolStosik]

After updating to netstandard2.0, xcc does not longer work.

[cswendrowski]

I was stuck on this issue as well, and finally stumbled upon a solution in this Xamarin Forms bug post

You need to add an [assembly: XamlCompilation(XamlCompilationOptions.Compile)] to your Shared project. This will precompile every XAML file which properly ignores all XAML definitions marked by a mc:Ignorable. XCC is no longer necessary for stripping out Ignorable content.

Full snippet below:

[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
namespace MyApp.Shared
{
    public class CoreApp : Application {

I have no idea how to resolve this issue for XAML files that are not being precompiled unfortunately.

[Sumaiya786]

Hi Team,

I am facing the same issue after upgrading to visual studio 2017, Xamarin 3.6, .NetStandard 2.0.

XCC is not working with above configuration.

The solution mentioned by "cswendrowski" is also not working.

Could you please provide the alternate solution as well as let us know is there any plan to update the nuget with support in .netstandard.

[KarolStosik]

@Sumaiya786 you don't need this Nuget any more. Remove it from your solution, and apply xaml compilation on the whole assembly.