Delete read-only file using batch file or command

I would like to know a way to delete a read-only file using a batch file or command.

Suppose I have a DLL file named "abc.dll" and I am trying to delete that file using the following command in a batch file:

del "C:\test\abcd.dll"

      

        
        
        
      

    

It prevents me from doing this and it throws an access denied message. However, if I change the read-only read-only attribute, I can successfully remove it.