Commented Unassigned: Not able to select all row of Datagrid [20736]

Can't able to select all row by Ctrl+A ,there are some rows which are missing from selection when i press Ctrl+A in datagrid.
Any suggestion
Comments: ** Comment from web user: ashu_avni **

Thanks for your valuable suggestion,problem has been solved.
Error generated by below code block
<my:DataGrid.RowStyle>
<Style TargetType="{x:Type my:DataGridRow}">
<Setter Property="IsSelected" Value="{Binding IsSelected}"/>
</Style>
</my:DataGrid.RowStyle>
Now i am using data grid "SelectedItems" property on selection changed event.