Garbage Collection

What is garbage collection?
Garbage collection is a CLR feature which automatically manages memory. Programmers forget  to release the objects while coding ..... laziness ( Remember in VB6 where one of the good practices is to set object to nothing).CLR automatically releases objects when they are no longer referenced and in use.CLR runs on non-deterministic to see the unused objects and cleans them.
One side effect of this non-deterministic feature is that we cannot assume an object is destroyed when it goes out of the scope of a function. Therefore, we should not put code into a class destructor to release resources.

(I) Can we force garbage collector to run ?
System.GC.Collect() forces garbage collector to run.This is not recommended but can be used if situations arises.