C # Boxing and unpacking principles

Transfer from http://jingyan.baidu.com/article/454316ab57a772f7a7c03aea.html

. NET contains a special object class that can accept values of any data type, and when the type passed or assigned is not a specific data type, the object class provides a common way to pass parameters and assign values. The value assigned to object must be a reference type and be stored in the managed heap.

Packing:

int age = 24;

Object refage= age;

As you can see, the first statement creates a variable age and places the value in the managed stack;

The second statement assigns the value of age to the reference type. It places the value 24 in the managed heap.

This value type is packaged as a reference type of procedure, called boxing.

Unpacking:

Conversely, the process of converting a reference type to a value type is called unpacking. Unpacking will cast the object to its original type. Unboxing the previous object.

int newage = (int) refage;

String newage = (string) refage;

The value of the unboxing must have the same type as the variable to which it is to be converted.

C # Boxing and unpacking principles