| A DLL in .NET is not a file but a external code repository for programs It will load and execute program dynamically. Dll can be used by different process and reusable when ever require.It will also reduce storage space.A synonym for a DLL would be library in .NET
In .NET it is a executable and resuable file.A dll is automatically created in asp.net when we build a project.u can referance this dll. | | |