The type or namespace name 'XXXXX' does not exist in the namespace 'XXXXXX' (are you missing an assembly reference?) BlazorHybrid (net6.0-maccatalyst), BlazorHybrid (net6.0-windows10.0.19041)

[nssidhu]

Description

I am using Microsoft Visual Studio Enterprise 2022 (64-bit) - Preview Version 17.1.0 Preview 2.0

I am using DI for Platform Specific code. when i am using Android simulator, my project compiles without any error and runs without any error.

But when i change to iPhone local Device i get the following compile time errors. By creating shell implementation for the interface in remaining other platform i was able to get over Interface implementation error but .css error still remained.

Steps to Reproduce

Create Blazor MAUI Hybrid App

1. Create Interface in the root of Blazor Hybrid App
2. Implement Interface only in the Android App

Try running the App on Andorid Simulator, it should compile and run without any error.

Change the Device to iPhone Local Device
It will start displaying compile time error and app cannot be launched.
2) Implement the interface in other platform(Ok throw not implemented error)

Interface related error will no longer show up but .css related error still exists and app cannot be compiled or launched

Version with bug

Preview 11

Last version that worked well

Unknown/Other

Affected platforms

iOS, macOS

Affected platform versions

ISO Platform is affected

Did you find any workaround?

none

Relevant log output

No response

[nssidhu]

I had to create empty shell Implementation for other platform to get around interface errors, but not sure how to resolve the .css error

[Eilon]

If the implementation exists only on some platforms but not others, then this error is expected. On the platform where the implementation doesn't exist, the code can't compile. You can add more #if WINDOW || ANDROID to import the namespace/types conditionally. Or, you can provide a "stub" implementation for the other platforms just to make things compile, even if the code just no-ops.

Can you confirm that is the case?

[nssidhu]

Stub Implementation did work, but still not able to compile because of .CSS Error.
The last two error in the screen shot are related to razor.css file. How do I resolve that ?

[Eilon]

We need to investigate the issue you logged in #4061 . I'm not sure why it's happening.