Project contains numerous invalid exports of ILanguageService

[sharwell]

ILanguageService needs to be exported using ExportLanguageServiceAttribute.

Here is one example:

roslynator/src/CSharp.Workspaces/CSharp/CodeMetrics/CSharpCodeMetricsService.cs

Line 12 in 7505ae8

[Export(typeof(ILanguageService))]

These exports are breaking Visual Studio in 17.10 Preview 3 and newer, where additional validation is applied to ILanguageService and ILanguageServiceFactory exports.

[IeuanWalker]

Breaks the latest VS preview - https://developercommunity.visualstudio.com/t/Projects-loading-failing-after-update--/10636927?q=Projects+loading+failing+after+update&sort=newest&ref=native&refTime=1712845785529&refUserId=41977fbd-5ec3-6a58-abad-5a72a9276adf&viewtype=solutions

[josefpihrt]

@sharwell Is this how it should be?

[ExportLanguageService(typeof(ILanguageService), LanguageNames.CSharp)]
[ExportMetadata("Language", LanguageNames.CSharp)]
[ExportMetadata("ServiceType", "Roslynator.CodeMetrics.ICodeMetricsService")]
internal class CSharpCodeMetricsService : CodeMetricsService

[sharwell]

@josefpihrt The ExportMetadata lines can be removed. You just need this:

[ExportLanguageService(typeof(ICodeMetricsService), LanguageNames.CSharp)]

[josefpihrt]

@sharwell Thanks!

[josefpihrt]

Fix has been released.