Return an Object or Return a Value

It looks like the GetCustomersWithOrderStatistics method  is returning some sort of Customer collection which will almost certainly be a reference type. So the method is therefore returning an object reference rather than a value.

The basic difference between a variable of a reference type and a variable of a value type is that the former holds an object reference (i.e. a pointer) and the latter holds the actual value itself.

However, confusing terminology abounds in programming and you'll often see what is being assigned to a variable referred to as a 'value' even though it is in fact an object reference!

The designers of C# haven't helped by using the name 'value' for the implicit parameter used in a property 'set' regardless of whether the property type is a reference type or a value type - though I suppose it might have been even more confusing if they'd used different names for each type :)

Hi,

Lets see from the basics.

object obj = "10";  //Derived from the System.Object type

When the object is created, it will be stored in the heap memory. It is object type and it will have the memory address of heap and when you pass to the other method, it passes the actual address not the actual value. When you change in one location in the current context throughout the reference will be changed.

int i = 5;  //Derived from the System.ValueType; 
The value type will be stored in the stack and it will have the value in the actual memory location. When you pass to a method, it will pass the actual value.

For example,

object obj = "10";
Swap(obj);

public void Swap(object obj1)
{
      obj1 = "20";
}

When you pass the object it will send the actual address and when you reassign the object value in the method it will change the value in the declaration variable of "obj".

The object, delegate, string are the example of object type (reference type)
The int, float, enum, struct are the example of value type (stack)

I hope you this will help you to understand.