Don't say big truth first, look at the code:
Classa obja = new classa (); obja.m_nvalue = 1; classa obja2 = obja; obja.m_nvalue = 2; messagebox.show (obja2.m_nvalue.tostring ());
When ClassA is a class, and Classa is a Struct, the result will be different!
Class: The memory is allocated from the heap. Obja2 points to Obja, so the value seen is 2;
Struct: The memory is allocated in the stack, and Obja2 copies an Obja, so the value seen is 1;
