Web table control

Question

I am adding some new pages to an existing C# asp.net 2010 web forms website. Due that that fact and I am new to web design but how desktop expereince, I have the following question:

On the exsiting web pages, most of the controls are embedded in a web table control. I am guesing this is occuring so all the web form controls are aligned correctly. Is that the only way to make the various controls line on correctly? If not, can you tell me another way how to make the controls all line up the same. (I do know when I worked with pure HMTL in year 2000, all the HTML controls were embedded within the same table.