class Program { static void Main(string[] args) { // // Example list // List<Person> Persons = new List<Person>(); Persons.Add(new Person("Jonas", 22)); Persons.Add(new Person("Peter", 19)); Persons.Add(new Person("Daniel", 20)); Persons.Add(new Person("Yvonne", 18)); Persons.Add(new Person("Jana", 26)); // Removes all persons younger than 20 years Persons.RemoveAll(delegate(Person P) { return (P.Age < 20); }); // Searches for specific entries and returns a list of // them List<Person> NewList = Persons.FindAll(delegate(Person P) { return (P.Age > 25); }); // Loops trough every item and modifies the // entries Persons.ForEach(delegate(Person P){ P.Name = "<" + P.Name + ">"; }); // Returns true or false if a specific entry is found bool Contains = Persons.Exists(delegate(Person P) { return (P.Age > 25); }); // Print the new list foreach (Person PersonObject in NewList) Console.WriteLine(PersonObject); } } // Example class public class Person { private string name = ""; public string Name { get { return name;} set { name = value;} } private int age = 0; public int Age { get { return age; } set { age = value; } } /// <summary> /// Constructor /// </summary> /// <param name="Name"></param> /// <param name="Age"></param> public Person(string Name, int Age) { this.name = Name; this.age = Age; } /// <summary> /// Overrides the default ToString method with /// a custom one /// </summary> /// <returns></returns> public override string ToString() { return String.Format("{0} ({1})", this.Name, this.Age); } }