static void Main(string[] args)
{
var l1 = new Logger();
l1.Value = "foo";
l1.Save();
var l2 = new Logger2();
l2.Value = 123;
l2.Save();
#region after Generics
//var l1 = new GenericLogger<string>();
//l1.Value = "foo";
//l1.Save();
//var l2 = new GenericLogger<int>();
//l2.Value = 123;
//l2.Save();
#endregion
Console.ReadLine();
}