You have created a new ASP.Net web application. 
You build the solution in Visual Studio .Net. 
You notice that there is a /bin directory under the virtual directory. Which type of files should you place in this location?

Only assemblies that are to be used on this one single web application should reside in the /bin directory of a web application. If the assembly is to be shared among several applications, it should be installed in the GAC of the machine where it is to be used.