Headercheckbox checks true only all record selected.if one record diselect don't check header

<RadzenCheckBox TriState="false" TValue="bool" Value="@(chequeBooklist. Any(1->chequeBookSelected I=null & chequeBookSelected.Contains(i)))

Change (args=> chequeBookSelected= args? chequeBookList.ToList():null

<RadzenCheckBox TriState="false" TValue="bool" Value="@(chequeBookSelected !=null && chequeBookSelected.Contains(chequebook))" Change (args =>{if(!allowRowSelectOnRowClick) {Cheque BooksGrid. SelectRow(chequebook);}})"/

/RadzenDataGridColumn>

selectedHeadercheckbox checks true only all record selected.if one record diselect don't check header.but in my code i select only one record then also header checkbox