Project-system: Convert to Collection Association on a Class Diagram shows an error

[filippobottega]

Hi,
I have an error using "Show as Collection Association" in Class Diagram.
Sorry for the italian version of screens.

Visual Studio Version:
Microsoft Visual Studio Enterprise 2019
Versione 16.4.6
.Net Core 3.1 Console App project.
Summary:
The command "Show as Collection Association" generate an error.
The wizard is unable to recognize System.Collections.Immutable.ImmutableArray.
HashStore.Model.FileSystemEntry is defined into the project.
System.Collections.Immutable.ImmutableArray is included in the .Net Core 3.1 framework.

Steps to Reproduce:

1. Command:
   

2. Error:
   

User Impact:
Unable to create a correct diagram with relationships between classes.

[tmeschter]

@filippobottega The Class Diagram feature is unrelated to this repo. Could you report a feedback item through Visual Studio?

[davkean]

@tmeschter This is very likely caused by iteraction with the new project-system.

[dmonroym]

Sending back to triage.
@davkean I thought class diagram hadn't been implemented, hence #5349. Can you give me a little more background on how this might be caused by the new project-system?

[davkean]

@dmonroym Class Diagram support was added back in 15.x.

Lots of these commands call through the project system APIs, I don't know in this particular what would be blocking this but start with the command and debug from there.

[jjmew]

@dmonroym You need manually enable it. You have to install the component called Class Diagram and then create a new class diagram.

[MiYanni]

Component is called Class Designer in the VS installer (not sure if name was changed). I've attempted to repo on latest main (16.9.0 Preview 3.0 [30814.93.main]) and was not able to reproduce the issue. GIF here:

@dmonroym Let me know if you can repro. If not, we should close.

[drewnoakes]

@MiYanni was your project targetting netcoreapp3.1?

[filippobottega]

@MiYanni please try using a console application targeting netcoreapp3.1 or .NET 5.0. I have the issue in Visual Studio 2019 Version 16.8.3 and also in Visual Studio 2019 Preview Version 16.9.0.

[MiYanni]

@drewnoakes @filippobottega My project was targeting netcoreapp3.1.

[filippobottega]

@MiYanni, please try using the attached solution.
ClassDiagramSample.zip

[drewnoakes]

@filippobottega thanks, your solution reproduces the issue:

Cannot show as association because 'System.Collections.Immutable.ImmutableArray' cannot be found.

Try one of the following:

• Ensure that 'System.Collections.Immutable.ImmutableArray' is an existing type.

• If 'System.Collections.Immutable.ImmutableArray' is defined outside your project, ensure you have placed the correct references in Solution Explorer.

Version 16.9.0 Preview 3.0 [30814.102.main]