I have a program 'class', which uses a Hashtable to "store" informations. This Hashtable is declared static.

If I write in main of this program:

class c1 = new class() and class c2 = new class(), then both work with the same Hashtable.
Now I have written a test-program, with input/output to test class. It should now works, that I can open test f.e. twice and both work with the same Hashtable. But it doesn't works so. Both get a new Hashtable.
Could somebody help me, and explain how I could synchronize that?
Thank you.