Gets or sets a value that indicates whether the ComboBox keeps the user's input or replaces the input with a matching item.
Assembly: PresentationFramework (in PresentationFramework.dll)
By default, when the user types a string into the ComboBox that matches one of its items, the item is selected and the text that the user typed is replaced. This can cause the text that the user entered to change case. If the property is set to true, the ComboBox selects the matching item, but preserves the text that the user entered. For example, suppose that a ComboBox contains the string, "Hello" (with a capital H) and the user enters "hello" (with a lowercase h). If is false, the ComboBox selects the matching item, "Hello," in its collection and populates its text box with that string. If is true, "Hello" is selected from the collection, but the text box says "hello."
Available since 4.5