No error reported for unclosed XML tags in .csproj, causing syntax highlighting to disappear

[wsmxd]

Once the .csproj file is malformed, the entire code parsing functionality stops working.

[lextm]

Not enough people were there to drive the open source MSBuild language server. Otherwise, it might have already supported semantic syntax highlighting and can be used here directly,

https://github.com/tintoy/msbuild-project-tools-server/issues

[MattParkerDev]

Thanks for reporting this. This should be handled like Rider does for malformed C# projects, to indicate that the project is no longer loaded in the workspace:

Ideally the failure would be surfaced somewhere like Rider:

And ideally (but with least priority, because it is probably the hardest), there should be syntax highlighting and diagnostics for the .csproj file indicating the failure: