ComboBox also offers many advanced features. These features are listed below:

• SelectedItem
  Represents the currently selected item in the drop-down list.
  
  
• SelectedIndex
  Represents the index of the SelectedItem in the drop-down list.
  
  
• SelectedValue
  Represents the value of the SelectedItem, obtained using the SelectedValuePath.
  
  
• SelectedValuePath
  Represents the name of the property used to get the SelectedValue and SelectedItem.
  
  
• MaxDropDownHeight
  Set the value of the MaxDropDownHeight property to set the maximum height of the drop-down list.
  
  
• MaxDropDownWidth
  Set the value of the MaxDropDownWidth property to set the maximum width of the drop-down list.
  
  
• IsEditable
  Determines whether a user can enter values that do not appear on the ComboBox's item list.
  
  
• VirtualizationThreshold
  Use the VirtualizationThreshold property to set the minimum number of rows and/or columns required to enable virtualization in the ComboBox control. For more information, see Virtualization.