PredicateForReadability.cs

// Great explanation on Stackoverflow: https://stackoverflow.com/a/1710395/190476

void Main()
{
	Predicate<Person> personWithId1 = person => person.Id == 1;
	Predicate<Person> personsOver30 = person => person.Age > 30;

	var persons = new List<Person>
	{
		new Person {
			Id = 1,
			Age = 35,
			Name = "Thirty Five"
		},
		new Person {
			Id = 2,
			Age = 24,
			Name = "Twenty Four"
		},
		new Person {
			Id = 3,
			Age = 30,
			Name = "Thir Ty"
		},
		new Person {
			Id = 4,
			Age = 40,
			Name = "For Ty"
		},
	};

	persons.Find(personWithId1).Dump("Id 1");
	persons.FindAll(personsOver30).Dump("Over 30");
}

// Define other methods and classes here
class Person
{
	public int Id { get; set; }
	public string Name { get; set; }
	public int Age { get; set; }
}