Access to bin path denied in ASP.NET Web Application

Just downloaded a solution from Visual Source Safe and I was getting lots of errors due to references not being found. So I went through each project and removed the old references and replaced them with the new references. However when I finally came down to the web app, it would not compile because it was unable to copy dll to the bin because access to it was denied. I checked the properties for the bin folder and noticed that it was readonly. So I unchecked the readonly property and applied it to all sub-folders and voila, the compiler is happy now and so I am 🙂