ASP.NET Layout??

[suketh]

hi Friends, i am working on ASP. i just updating my skills ASP to ASP.NET (using MSDN, and some other sites). some one asked me what is ASP.NET Layout? i googled for ASP.NET Layout, but found different concepts on this ASP.NET Layout. please can anyone give me the idea about this ASP.NET Layout? thanks in advance, Suketh