JIGNESHGM/DoteNetCode ? reverse-engineered prompt

Build me a simple ASP.NET Web Forms site that shows a few working demos in the browser.

I want one page for a general form demo, and another page that shows basic number and page operations. The app should have a clean, old school Web Forms feel, with server side code behind files and whatever validation controls are needed so the examples actually work. Make the pages easy to open and test, with clear labels, inputs, buttons, and visible results or error messages when something is entered wrong.

Please wire everything up so the pages run properly from Visual Studio, including the project and config files, and keep the code organized in the same style as a typical Web Forms sample project. If anything about the current framework setup is unclear, check the current docs online and use the simplest working approach.