As you know the C# Type contains three Types
- Value Types
- Reference Types
- Pointer Types
Converting a value type to a reference type called Boxing and vice versa is called Unboxing.
Boxing is an implicit conversion of a value type to a type object or to any type of interface implemented by this value type.
int value = 1234; object o = value;
Boxing is used to store value types in the garbage-collected heap. Boxing a value type allocates an object instance on the heap and copies the value into the new object.
Unboxing extracts the value type from the object
object o = 1234; int value = (int)o;// unboxing
Unboxing is an explicit conversion from the a object to the value type or from an interface type to a value type that implements the interface