[v11] C# Project Details does not show a solution node

Describe the issue

In C# Dev Kit v11, the C# Project Details view shows projects directly at the root and does not include a solution node. This occurs both when a solution is open and when C# Dev Kit is running in workspace development mode.

Without a solution node, the tree does not represent the solution-to-project hierarchy and makes it harder to understand which solution contains the displayed projects.

Collect logs

Not collected.

Steps to reproduce

With a solution open

1. Open a C# solution in VS Code.
2. Open the C# Project Details view.
3. Observe that the project appears at the root of the tree and no solution node is shown.

In workspace development mode

1. Open a C# workspace in workspace development mode.
2. Open the C# Project Details view.
3. Observe that projects appear at the root of the tree and no solution node is shown.

Expected behavior

The C# Project Details view should show a solution node with its projects nested beneath it, both when a solution is explicitly open and when using workspace development mode.

Actual behavior

Projects are displayed directly at the root of C# Project Details. The status bar identifies the active solution, but the corresponding solution node is absent from the tree.

Environment information

• C# Dev Kit version: v11
• Reproduces with: An open solution and workspace development mode