Error 3 The type or namespace name 'RadComboBoxItem' could not be found (are you missing a using directive or an assembly reference?) D:\Anshul\College site\Student\books.aspx.cs 33 13 D:\Anshul\College site\
Error 4 The type or namespace name 'RadComboBoxItem' could not be found (are you missing a using directive or an assembly reference?) D:\Anshul\College site\Student\books.aspx.cs 33 40 D:\Anshul\College site\
Also, I've been working in WPF for a while now but does the Ajax RadCombo have an EmptyText property?
I use that and don't have to bother with adding a default Item. If nothing is set to SelectedItem when you populate, the text you use for EmptyText will show in the combo.