static void main()
{
int i = 0; //int is a structure therefore value type
// when declared it is stored in the stack in m/m
//they hold value where they are declared
Cust c1 = new Cust(); //customer is a class and therefore reference type
//the object reference variable c1 is stored in the stack
//the actual object however is stored in the heap
c1.id = 101; //in the heap
c1.name = "Mark"; //in the heap
}
//the value types are destroyed once their scope is over
//in case of referenc types
// 1. reference object is destroyed once its scope is over
// 2. the actual object in the heap is destoyed by the GC(garbage collector) when it finds
// that the object has no reference variable
static void diff()
{
int i = 10; //i is a struct
int j = i; //j is a struct value of i is assigned to j
j = j + 1; //operations on j will not affect the value of i because i & j are two different copies on the stack
Console.WriteLine("i = {0} && j = {1}", i, j);
Cust c2 = new Cust();
c2.id = 101;
c2.name = "Name";
Cust c3 = c2; //now what happens is c3 is a copy of the reference variable
//both c2 and c3 points toward the same objects in the heap
c3.name = "New";
Console.WriteLine("c2.Name= {0} and c3.Name = {1}", c2.name, c3.name); //here both will be "New"
}