Accelerated C# 2008

public void Print()

{

System.Console.WriteLine( "{0}", x );

}

}

public class EntryPoint

{

static void Main()

{

MyValue myval = new MyValue();

myval.x = 123;

// no boxing

myval.Print();

// must box the value

IPrint printer = myval;

printer.Print();

}

}

The first call to Print is done through the value reference, which doesn’t incur boxing. How-

ever, the second call to Print is done through an interface. The boxing takes place at the point

where you obtain the interface. At first, it looks like you can easily sidestep the boxing operation by

not acquiring an explicit reference typed on the interface type. This is true in this case, since Print

is also part of the public contract of MyValue. However, had you implemented the Print method as

an explicit interface, which ...