C# 0 The Complete Reference

PART I

C h a p t e r   2 0 :  

U n s a f e   C o d e ,   P o i n t e r s ,   N u l l a b l e   T y p e s ,   a n d   M i s c e l l a n e o u s   T o p i c s  

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PART IPART I

class FixedCode {

  // Mark Main as unsafe.

  unsafe static void Main() {

    Test o = new Test(19);

    fixed (int* p = &o.num) { // use fixed to put address of o.num into p

      Console.WriteLine("Initial value of o.num is " + *p);

      *p = 10; // assign 10 to count via p

      Console.WriteLine("New value of o.num is " + *p);

    }

  }

}

The output from this program is shown here:

Initial value of o.num is 19

New value of o.num is 10

Here,