A set of technologies in .NET for building web applications and web services. Miscellaneous topics that do not fit into specific categories.
If you are using Visual Studio then create a project reference to the library project or copy the library project's dll file to main project's bin folder.
Manage references in a project
In the main project add a "using" statement to the top of a code file that contains the namespace of the library code you wish to call.
Finally call the code.
If these are two ASP.NET projects then you have a design bug and need to move the shared code into a library project.