[v11][maui] fastbuild doesn't work with MAUI projects

Describe the issue

When doing right click > "Build" on the "C# Project Details" section, fastbuild will throw an error for MAUI projects:

In Linux, there is an additional line of error:

Second build will likely succeed and also F5 works.

Suggestion: according to what I discussed with Ema, maybe the best option is to disable fastbuild for now for MAUI projects, based on the MAUI capabilities in the lscache file

Collect logs

csdevkit-logs-2026-08-24T16-09-45.zip

Steps to reproduce

1. Create any .NET10 or .NET11 MAUI App/Blazor/ iOS/Android app
2. Choose any debug target
3. Build the project

Expected behavior

Building should succeed on first try

Environment information

• VSCode: 1.136.0-insider (Universal)
• .NET SDK: 10.0.400
• MAUI: 10.0.20

Extension:

• NET MAUI: 1.17.228-g7a01fb0c71
• C# Dev Kit: 9.9.462-gf055a7
• C#: 2.151.17