static void Main(string[] args)
{
_provider = BuildDependencies().BuildServiceProvider();
var logger = _provider.GetService <ILoggerFactory>().CreateLogger <Program>();
#region ObserverPattern
logger.LogInformation("Observer");
var product = new Product {
Name = "Coffee", State = "Unavailable"
};
var loggerFactory = _provider.GetService <ILoggerFactory>();
var o1 = new Observer(loggerFactory, product);
var o2 = new Observer(loggerFactory, product);
product.Attach(o1);
product.Attach(o2);
product.SetState("Available");
product.DetachAll();
#endregion
var testEmpty = String.IsNullOrEmpty("This is a test string");
logger.LogInformation(testEmpty.ToString());
#region FactoryMethodPattern
logger.LogInformation("FactoryMethod");
var reconObj = _provider.GetService <IReconObjectFactory>();
IReconcile recTrade = reconObj.GetReconObject("Trades");
recTrade.DoReconciliation();
IReconcile recFixing = reconObj.GetReconObject("Fixings");
recFixing.DoReconciliation();
#endregion
#region SingletonPattern
logger.LogInformation("Singleton");
var singleObj1 = SingletonService.GetInstance();
singleObj1.PrintPattern();
var singleObj2 = SingletonService.GetInstance();
singleObj2.PrintPattern();
#endregion
Console.ReadLine();
}