Lot of people trying to edit the code when ASP.NET Development Server is running but they can't. In order to edit code you have to stop debugger/ ASP.NET Development server then you can edit it.
If you want to continue code edit while your are running ASP.NET Development Server try this:
http://localhost:3499/Default.aspx
You do have the option to control which port is used when using the
built-in development server. The steps to specify the port to be used
are slightly different depending on whether you are using a website
project or a web application project.
ASP.NET Development Server - Web Application project
Right click the Project in the Solution Explorer, and then select “Properties”
Click “Web” tab.
Go to Server section (Make sure Visual Studio Development server is selected)
- Check Enable Edit and Continue is turned on
The ASP.NET Wiki was started by Scott Hanselman in February of 2008. The idea is that folks spend a lot of time trolling the blogs, googlinglive-searching for answers to common "How To" questions. There's piles of fantastic community-created and MSFT-created content out there, but if it's not found by a search engine and the right combination of keywords, it's often lost.
The ASP.NET Wiki articles moved to CodeProject in October 2013 and will live on, loved, protected and updated by the community.