I am working on asp.net(3.5) in my project there is one layer named app_code contain the business logic of the project in this project I have added one reference file named Microsoft.ApplicationBlocks.Datawhen I include namespace in default.aspx.cs file it works properly but when I work on the business logic class file which is in *app_code* folder I show compile time error.I have not find any solution
please give solution....thanks in advance....
