public static void Main(string[] args)
{
EagerSingleton eagerSingleton = EagerSingleton.GetInstance();
Console.WriteLine(eagerSingleton.ToString());
LazySingleton lazySingleton = LazySingleton.GetInstance();
Console.WriteLine(lazySingleton.ToString());
}
private static void TestSingleton(string value)
{
var singleton = LazySingleton.GetInstance(value);
Console.WriteLine(singleton.Value);
}