test.cs

FormField[] acroForms = Forms.GetAcroFormFields("lease_agreement.pdf");

foreach (FormField field in acroForms) {
    switch (field) {
        case FormTextField textField:
            Console.WriteLine("Field \"{0}\" extracted: {1}",
                textField.FieldName,
                textField.Value);
            break;

        case FormCheckBox checkBoxField:
            Console.WriteLine("Field \"{0}\" extracted: {1}",
                checkBoxField.FieldName,
                checkBoxField.IsChecked.ToString());
            break;

        case FormComboBox comboBoxField:
            Console.WriteLine("Field \"{0}\" extracted. Selected value: {1}",
                comboBoxField.FieldName,
                comboBoxField.Value);

            foreach (var item in comboBoxField.Options) {
                Console.WriteLine(" -> Option: {0}", item);
            }

            break;
    }
}