unable to extract tgz with tar

Oct 9, 2014 at 1:03 PM
i have a tgz file that contains a tar file inside of it, when i attempt to extract the .tar file i get error

ArgumentException was unhandled by user code

The entry's file name cannot be empty.

i can open the tgz file in windows 7zip app and see the .tar file inside of it?? so why am i not able to do the same