ADO.NET DataSet lacks byte[] type in DataColumn properties

[rmkarasev]

Environment

Microsoft Visual Studio 2026
Version: 18.2.0

.NET version

.NET 8

Did this work in a previous version of Visual Studio and/or previous .NET release?

Works on .NET Framework

Issue description

In the project targeting .NET 8, it is not possible to set up a DataColumn in the DataSet Designer with byte[] type.

.NET Framework screenshot

.NET 8 screenshot

Steps to reproduce

1. Create a WinForms .NET project.
2. Add a New Item - DataSet.
3. Open the DataSet Designer, add a DataTable from the right-click menu, add a DataColumn to the table.
4. Go to the Properties -> DataType -> the Byte[] item is missing in the dropdown list.

[LeafShi1]

Internal bug https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1710571