Adds a new item to the end of the collection, and assigns the string value to both the Text and Value properties of the item.
Adds the specified list item to the end of the collection.
Inserts an item at the specified index location in the collection, and assigns the specified string value to the Text property of the item.
Inserts the specified.list item at the specified index in the collection.
Removes the item whose Value property equals the specified string.
Removes the specified list item from the collection.
Removes the item at the specified index from the collection.
Removes all the items from the collection.
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