Boxing is the process of casting value type to reference type.
Unboxing casts the reference type to value type.
The following code is boxing the i to object.
using System;
class Program
{
static void Main(string[] args)
{
int i = 0;
object obj = i;
Console.WriteLine(obj);
}
}
The output:
0
The unbox requires an explicit cast.
using System;
class Program
{
static void Main(string[] args)
{
int i = 0;
object obj = i;
int j = (int)obj;
Console.WriteLine(obj);
Console.WriteLine(j);
}
}
The output:
0
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