datagrid

I have placed a datagrid on a webform.
Asigned several bound columns and button columns.

In design mode, the datagrid has the ones I have added as well as column0, column1, column2 which i do not want. These extra columns are just repeat of some of the ones I have added.
How can I delete these columns.
p.s. they do not appear in the propertybuilder

Thanks

This questions better be asked in ASP.NET category of this forum. However to solve your problem, in the property builder columns section, remove the tick of 'Create Columns Automatically at Runtime'.