[Bug] .NET 9 Target Framework Missing

[Bram1903]

Describe the bug

I am working on multiple projects, and today I updated one of them to .NET 9, following the release of .NET 9 Release Candidate 2. However, when trying to add a migration in the project targeting .NET 9, the target frameworks don't show up in the plugin. Initially, I suspected an installation issue, but after switching between projects using .NET 8 and .NET 9, it became evident that the issue only occurs with the .NET 9 plugin. I also tried removing both .NET 8 and .NET 9 to test the behavior, but the problem persisted. The same project works fine under .NET 8, but simply switching to the .NET 9 SDK renders the plugin unusable. Rider also displays a warning in the "Add migration" window when the project is set up to target .NET 9, as shown below:

To Reproduce

Steps to reproduce the behavior:

1. Open a project targeting .NET 9
2. Go to the "Add migration" window
3. Observe that it cannot find a target framework or any of the startup projects

Expected behavior

.NET 9 should appear as a valid target framework, and the startup project list should be populated.

Screenshots

.NET 8 (Working as expected):

.NET 9:

Environment:

• OS: Windows 11 (64-bit)
• .NET SDK info: .NET 8 & .NET 9 installed, using .NET 9 within Rider
• Plugin version: 1.5.25.10
• Rider version: 2024.2.6
• Microsoft.EntityFrameworkCore Library: 9.0.0-rc.1.24451.1 due to Npgsql.EntityFrameworkCore.PostgreSQL. not being updated yet.

[seclerp]

Hi @Bram1903, thank you for reporting! The problem is known and will be fixed in one of the upcoming 2024.3 EAP versions of Rider.