C # Boxing and unboxing operation instance Analysis _c# Tutorial

The examples in this article describe C # Boxing and unboxing operations. Share to everyone for your reference, specific as follows:

1. Boxing in C #

Boxing in C # is an implicit conversion of a value type to type object, using a copy of the value instead of a reference in the conversion process , as can be seen from the following example:

Using System;
public class Test
{public
  static void Main (string[] args)
  {
    int i = ten;
    I boxing the value type
    //NOTE: The boxing here uses a copy of the value of
    object obj = i;
    Verify that the boxing succeeded the
    if (obj is int)
    {
     Console.WriteLine ("Data is boxed!");
    }
    We are here to change the value of I
    =;
    Console.WriteLine ("Int I now value is: {0}", i);
    Console.WriteLine ("Int I boxed value is: {0}", obj);
  }

2. The unboxing in C #

a unboxing in C # is an explicit conversion of an object type to a value type , noting that the type to be converted must be compatible with the value type . Examples are as follows:

int i = ten;
Object obj = i;
int j = (int) obj;

Here's what you need to be aware of:

Boxing and unboxing are very important for program performance, and you should avoid boxing and unboxing operations in your code. You can use generics to reduce such an operation.

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I hope this article will help you with C # programming.