c# - Change datagrid selected item using two comboboxes -

i have datagrid containing information users

  username    userid    userhobby 

and have combobox linked each of columns above. if user select of boxes individually brings selected datagrid row first occurance of matching row. if instance user selects value "bryan" username , hobby "golf" want selected cell move row both values present.

at moment selectedindexchanged code second combobox follows :

datagrid.selectedrows =            datagrid.selectedrows.where(           x =>x.row.field<string>(datagrid.text)           .contains(hobbycombobox.text)); 

however not working , have similar approach or solution

based on feedback answers code looks

  var query = datagrid.selectedrows.cast<datagridviewrow>()                             .where(x => x.row.field<string> (datagrid.text).contains(combobox10.text));           datagrid.datasource = query.tolist();           datagrid.refresh() 

however throwing error on x.row

            system.windows.forms.datagridviewrow' not contain definition  'row' , no extension method 'row' accepting first argument of type  'system.windows.forms.datagridviewrow' 

datagrid.selectedrows read only. need rebind datasource.

var query = datagrid.selectedrows.cast<datagridviewrow>()                     .where(x =>x.row.field<string>(datagrid.text).contains(hobbycombobox.text)); datagrid.datasource=query; datagrid.refresh();