Benefits of ASP.NET

It represents an exciting new platform for creating web sites with the .net framework, using any .net language. The benefits are,
Structure	ASP.NET brings structure back into programming by offering a code-behind page, which separates the client-side script and HTML from the server-side code.
Layout control	Using web forms in ASP.NET and positioning controls such as text boxes and buttons is easy, and VS.NET will create the appropriate HTML code for the target browser that is selected. For instance, to be compatible with most browsers, VS.NET will create tables, and nested tables to obtain the desired positioning of the controls. If the application only needs to be compatible with the latest version of Internet Explorer, then VS.NET will position the controls using DHTML.
Compiled Code	ASP.NET solves the problem of running interpreted script by compiling the server-side code into IL (Intermediate Language). IL code is significantly faster than interpreted script.
Early binding	ASP.NET also uses early binding when making calls to COM components, resulting in faster performance.
Security	ASP.NET has an enhanced security infrastructure that can be quickly configured and programmed to authenticate and authorize Web site users.
Performance	ASP.NET contains performance enhancements, such as page and data caching.
Diagnostics	ASP.NET offers an enhanced tracing and debugging option, which will save time when you are ready to get the system running.
Session State	ASP.NET has an improved session object. Session state can be configured to be shared among all servers in a web farm.
.NET Framework	Since ASP.NET uses the .NET framework, ASP.NET also inherits the features of the .NET Framework, such as: Automatic memory cleanup via garbage collection Cross language inheritance A large object-oriented base class library The use of ADO.NET to access database
Web Services	ASP.NET also provides the web service infrastructure. It is possible to create a web service with very few lines of code.