Dynamic User Interface in ASP.NET Web Applications

Every developer knows well that to be able to design a proper user interface then we have to have a solid knowledge about every aspect of this user interface before we actually start designing it. Unfortunately, this is not always 100% possible. Situations arise from time to time in which we have no or little idea about what will be the proper user interface for a given application. In web applications things becomes worth as these situations arises more frequently.