To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) The Items property of a ComboBox is a collection of items. This is correct because the Items property allows you to add, remove, and access the items in the ComboBox.
Option B) The Items property of a ComboBox is the same as the Items property of a ListBox. This is incorrect because although both ComboBox and ListBox have an Items property, they are separate controls with their own implementations.
Option C) The Items property of a ComboBox contains methods and properties. This is correct because the Items property provides methods and properties to manipulate the collection of items in the ComboBox.
Option D) The Items property of a ComboBox is both a collection of items and the same as the Items property of a ListBox. This is incorrect because option B is incorrect.
Option E) All of the above. This is the correct answer because options A and C are correct. The Items property of a ComboBox is a collection of items and it contains methods and properties.
Therefore, the correct answer is E. All of the above.