Most important keywords for Object-Oriented

- Inheritance
- Polymorphism
- Data abstraction
- Encapsulation

System.Web.UI.WebControls.Menu css definition problem

If use .Items.Clear() to clear up menu collection, 

will lost css definition in  StaticItemTemplate

IIS Express support SSL in development environment

IIS Express supports SSL. The setup program will install a default, self-signed server certificate in the machine store and configure ports 44300-44399 for use with SSL. You can also set up and configure custom SSL certificates for your websites as an administrator.