/// <summary> ANOTHER WAY TO CREATE SINGELTON WITHOUT LOCK
// public sealed class Singleton
// {
// private static readonly Singleton instance = new Singleton();
// Explicit static constructor to tell C# compiler
// not to mark type as beforefieldinit
// static Singleton()
// {
// }
// private Singleton()
// {
// }
// public static Singleton Instance
// {
// get
// {
// return instance;
// }
// }
// }
/// </summary>
public Product Build(IProductBuilder builder)
{
builder.setName("bla");
builder.setNumber(10);
return(builder.GetProduct());
}