ASP.NET is superior to ASP Classic. There are four main areas that make ASP.NET a much better choice for programmers. These four areas include: stability, performance, scalability, and language support.
ASP is running under the inetinfo.exe (IIS) process space, making is susceptible to application crashes. This happens because the IIS needs to be stopped or restarted on a regular basis. The ASP.NET process is separate from inetinfo.exe, meaning that it is not susceptible to these types of application crashes. This means that the final product will be much more stable.
ASP.NET however compiles the code the first time it is accessed. The compiled code results in .NET classes housed within assemblies and allow subsequent page requests to be serviced with previously compiled code. ASP.NET therefore inherently provides a more secure and largely efficient rendering model by incorporating compilation and specifically the reuse of the compiled code. this ultimately means a better experience for the end user.
With Classic ASP applications, components used by pages are fairly difficult to update, maintain, or replace. In general, updating a component in a running application will require the shutting down of IIS, replacement of the component and finally a restart of IIS.
ASP.NET was built to provide specific enhancements that allow scalable and efficient application updating. The ‘xcopy’ deployment model of .NET allows replacement of pages and components in real time and does not require a restart of the web server. If an update needs to be made to a current production application, developers can simply make the change and the infrastructure can account for that change the next time a request is made to the altered page or component. This means that content updates, fixes, and enhancements to ASP.NET applications can be made in real time with little to no impact to the user base.
4. Language Support