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Categories / C# Book / 01 Language Basics

 

0167 interface and struct boxing

struct is a value type while interface is a reference type. A cast from struct to an interface is a boxing. using System; interface Printable { void print(); } struct Rectangle : Printable { public void print() { Console.WriteLine("rectangle"); } } class Test { static void Main() { Printable p = new Rectangle(); // boxing p.print(); } } The output: rectangle