private void btFilterPattern_Click(object sender, EventArgs e)
{
string str = "";
List <Person> persons = new List <Person>();
persons.Add(new Person("Robert", "Male", "Single"));
persons.Add(new Person("John", "Male", "Married"));
persons.Add(new Person("Laura", "Female", "Married"));
persons.Add(new Person("Diana", "Female", "Single"));
persons.Add(new Person("Mike", "Male", "Single"));
persons.Add(new Person("Bobby", "Male", "Single"));
ICriteria male = new CriteriaMale();
ICriteria female = new CriteriaFemale();
ICriteria single = new CriteriaSingle();
ICriteria singleMale = new AndCriteria(single, male);
ICriteria singleOrFemale = new OrCriteria(single, female);
str += "Males:\r\n ";
str += printPersons(male.meetCriteria(persons)) + "\r\n";
str += "Females:\r\n ";
str += printPersons(female.meetCriteria(persons)) + "\r\n";
str += "Single Males:\r\n ";
str += printPersons(singleMale.meetCriteria(persons)) + "\r\n";
str += "Single Or Females:\r\n ";
str += printPersons(singleOrFemale.meetCriteria(persons)) + "\r\n";
tbOutWindow.Text = str;
}