It is possible in asp.net 2 that c# an vb.net classes can be used in same project
All class files are contained in app_Code folder which is compiled into single assembly.
It is possible that classes placed in same folder causes error. So make different folders in app_data such as “vbclasses” and “c#classes”
now places vb and c# classes in their respective folders as
now we have to add some lines in web.config under the compilation key
now asp.net compile the code in single assembly and we can use the implementation of code placed in vb or c# class in our application without specifying their extensions