Answer:   Boxing
Implicit
Converting a value type to the type object
eg : obj myObject = i;

Unboxing
Explicit
Extracting the value type from the object
eg : i = (int)myObject;

Answer:   Boxing - It is the process of converting a value type to the object type or any interface type implemented by this value type. Boxing is implicit.

Example: Boxing Copy
int i = 10;
object o = i; //performs boxing

In the above example, the integer variable i is assigned to object o. Since object type is a reference type and base class of all the classes in C#, an int can be assigned to an object type. This process of converting int to object is called boxing.


Unboxing - It is the reverse of boxing. It is the process of converting a reference type to value type. Unboxing extract the value from the reference type and assign it to a value type.

Unboxing is explicit. It means we have to cast explicitly.

Example: Unboxing Copy
object o = 10;
int i = (int)o; //performs unboxing