//używając metod anonimowych
var worker1 = new System.ComponentModel.BackgroundWorker();
worker1.DoWork += (sender,e) => Thread.Sleep(10000);
worker1.RunWorkerCompleted += (sender,e) => MessageBox.Show("Worker1 Finished!");
worker1.RunWorkerAsync();

class AuthorsByNameQuery   
{  
    internal DetachedCriteria Criteria;  
        
    public AuthorsByNameQuery()  
    {  
      Criteria = DetachedCriteria.For<Author>();  
    }  
          
    public IList<Author> List(ISession session)  

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
 
namespace Orxxx.Data 
{
    public interface IRepository<T> 
    {
        void Create(T entity);

public interface IRepository<T>
{
    T GetById(Guid id);
    T GetByQuery(Query query);
    void Add(T item);
    void Remove(T item);
    void Update(T item);
}
 
//mozliwe jest rozszezenie generycznego interfejsu o metody specyfikczne

//Enum declaration
public enum RoleType
{
    [Description("Allows access to public information")] Guest = 0,
    [Description("Allows access to the blog")] BlogReader = 4,
}
 
//Converter
public static string ReadDescription<T>(T enumMember)
{

public class AnonymousComparer<T> : IComparer<T>
{
    private Comparison<T> comparison;
 
    public AnonymousComparer(Comparison<T> comparison)
    {
        if (comparison == null)
            throw new ArgumentNullException("comparison");
        this.comparison = comparison;
    }