dispose()

Dispose is not equivalent to a C++ destructor. I have read that Finalize is more like a C++ destructor.
 
In C# and Java objects are clened up using garbage collection. Garbage collection is supposed to make things easier but there are things such as Dispose and Finalize that are really complicated and confusing. Generally speaking, you don't need to implement Dispose for managed objects. Dispose is usually used when there are unmanaged resources that need to be deleted or freed.
 
Note that your question is very vague; I hve already spent much more time answering than you spent asking. If you want a more specific answer then spend the time to create a more specific question. Also spend time reading relevant articles and other resources.