Boxing occurs when passing values : Boxing Unboxing « Data Type « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Data Type
3. Boxing Unboxing

using System; 
 
class MainClass { 
  public static void Main() { 
    int x; 
    
    x = 10; 
    Console.WriteLine("Here is x: " + x); 
 
    // x is automatically boxed when passed to sqr() 
    x = sqr(x); 
    Console.WriteLine("Here is x squared: " + x); 
  } 
 
  static int sqr(object o) { 
    return (int)o * (int)o; 
  } 
}

Here is x: 10
Here is x squared: 100