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>.
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.