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How to add typed text in choices of WinForms ComboBox AutoComplete when pressing Enter key?

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Adding new text to string list

There may be a scenario where you want to type an entry in the ComboBoxAutoComplete control and then press enter to save what was typed as a new choice available for autocompletion.

To enable this behavior, you need to set the AutoAddItem property of the AutoCompleteControl which is a property of the ComboBoxAutoComplete control to True.

When the AutoAddItem property is set to true, items will be automatically added to the history whenever the validation event is raised. This property is set to False by default.

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