use of java.lang.Object in C#

Hi Guys, I'm starting to create a DLL which would do some of the zipping in my other application. I'm trying to get this work in C# and before I even could start code I already have some issues. I would like to create an object of the class ZipOutputStream but I saw it is in the library java.lang.Object. How do you need to call this library?? Not with ...using java.lang.Object... for sure I hope you guys can get me on track ;-) Thx, Philippe