Multiple selection in Datagrid not working for me

[PeterBeery]

I've checked the Multiple Selection option on my datagrid but when I run the page I don't see the check boxes at the beginning of each row. I must be missing something simple. Can someone explain what newbie mistake I am making? Thanks

[enchev]

The checkboxes are additional column. Check our demo for reference:

Blazor DataGrid Component - Multiple Selection | Free UI Components by Radzen