Unable to launch the ASP.NET Development server because port '1900' is in use

Question

I was developing just fine in VS 2008 and testing my ASP.NET web site on my development server when suddenly I was unable to run my web site anymore. As soon as I hit F5, th

Answer 1

In the website portion of the project, right click and do "Properties Window" NOT "Property Pages" Change "Use Dynamic Ports" to TRUE. You can keep 80 there if it's the port listed--the key is to Use Dynamic Ports.