Duplicate DLLs

Hi,

I have an ASP.NET project that refers to Microsoft.ApplicationBlocks.Data.dll. The file structure is as follows:

MyProject

      \bin

      \Microsoft.ApplicationBlocks.Data

                  \bin

Although I have Microsoft.ApplicationBlocks.Data.dll in the \Microsoft.ApplicationBlocks.Data\bin subfolder, Visual Studio created a copy of this DLL in the MyProject\bin folder.

That's why while the application is released, removing Microsoft.ApplicationBlocks.Data.dll from the \Microsoft.ApplicationBlocks.Data\bin subfolder on the target server seems not to affect the app's functionality.

Here is my question: is it safe if I release Microsoft.ApplicationBlocks.Data.dll located in MyProject\bin and don't release the \Microsoft.ApplicationBlocks.Data\bin subfolder?

Thanks.