c# - MSFT Contoso University Tutorial on EF and MVC Inheriting from Namespace -

in tutorial: https://www.asp.net/mvc/overview/getting-started/getting-started-with-ef-using-mvc/creating-an-entity-framework-data-model-for-an-asp-net-mvc-application theres part code this:

public class schoolinitialzier : system.data.entity,                      dropcreatedatabasemodelchanges<schoolcontext> 

it gives me these errors:

system.data.entity namespace used type. type or namespace name dropcreatedatabasemodelchanges not found

what mean when inherit way? correct? why msft tutorial telling me it? proper way trying achieve?

thanks

you have typo , comma

system.data.entity.dropcreatedatabasemodelchanges<schoolcontext> 

if implementing 2 interfaces have comma

public class foo : iidentity, iknowskungfoo