WebPartmanager is necessary to use Webparts in web page - ASP.NET Introduction
Q. If you are using Webparts in your web page then which control is necessary? - Published on 19 Oct 15a. WebpartController
b. WebPartmanager
c. WebpartZone
d. None of the above
ANSWER: WebPartmanager
WebPartmanager control is necessary for using webparts in ASP.NET. This control will manage different webpart in web page. When you run the application you will not see any WebPartmanager control because it is a non - visual control. It is most important control while using weparts. It provides the functionality for adding, deleting, and closing WebPart controls on a page.