Gets or searches for the text of the currently selected item in the ListBox.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
When the value of this property is set to a string value, the ListBox searches for the item within the ListBox that matches the specified text and selects the item. You can also use this property to determine which items are currently selected in the ListBox. If the SelectionMode property of the ListBox is set to SelectionMode.MultiExtended, this property returns the text of the first selected item. If the SelectionMode property of the ListBox is not set to SelectionMode.None, this property returns the text of the first selected item.