Datatable visualizer content missing

[jieny]

Versions

• Visual Studio version: 16.9.5
• ASP.NET CORE 5.0 (ASP.NET CORE 3.1 or WorkService Project is normal)

What happened

Steps to Reproduce

Steps to reproduce the behavior:

1. new ASP.NET CORE 5.0 project
2. DataTable dt = new DataTable(); dt.Columns.Add("xxx");
3. see dt

Expected behavior

see DataTable content

Screenshots

Logs

Additional context