RadToolBar provides three types of items - RadToolBarButton, 
            RadToolBarDropDown and RadToolBarSplitButton
    
    
        - RadToolBarButton:
            
                - Can be templated, e.g. you can define an ItemTemplate for it
- Can be set to act as a separator using the IsSeparator property
- Can be set to directly navigate to a specified URL using the NavigateUrl
                    property
- Several buttons can be grouped group and checked/unchecked respectively. Use the
                    CheckOnClick, Checked, Group
                    and AllowSelfUnCheck properties to control the check functionality
                    of a button.
- When an event handler is attached to the toolbar's ButtonClick
                    event, buttons make postback by default. Use the PostBack property
                    of a button to disable the postback for it
 
- RadToolBarDropDown can contain buttons in its dropdown
- RadToolBarSplitButton:
            
                - Can contain buttons in its dropdown
- Can be set to directly navigate to a specified URL using the NavigateUrl
                    property
- When an event handler is attached to the toolbar's ButtonClick
                    event, clicking the button part of a split button initiates postback by default.
                    Use the PostBack property of a split button to disable the postback
                    for it