static string Hello => @"Hello world , Lind!"; //static string Hello{get;}

 static DateTime AddTime { get; set; } = DateTime.Now;

      static Dictionary<string, string> dictionary1 = new Dictionary<string, string>

        {

            ["name"] = "lind",

            ["age"] = ""

        };

 static string t2 = $"时间从{DateTime.Now}到{DateTime.Now.AddDays(1)}";

 static Test test = new Test();

 static string title = test?.Name;//if(test!=null) title=test.Name;

 static List<Test> testList = null;

 static Test defaultList = testList?[];

 public void ConsolePrint(string msg) => Console.WriteLine(msg);