Adding custom property to the rectangle class

I need to add a custom property to the Rectangle class. I tried to subclass the Rectangle class but it didn't work. Is there开发者_开发问答 a way to do that. Thanks

You can't inherit from System.Drawing.Rectangle, because it's not a class, it's a struct. What you can do is to create your own class (or struct) that wraps Rectangle, something like:

class MyRectangle
{
    public Rectangle ActualRectangle { get; set; }
    public SomeType AdditionalProperty { get; set; }
}

Or you could hide the Rectangle and provide methods and properties that mirror those of Rectangle that call them.

You can not extend Rectangle as it's a value type. In my opinion you have 2 choices:

1. Extension method. Something like this:

   public static class Extensions
   {
       static object myporpertyvalue = null;
       public static void SetMyProperty(this Rectangle rect, object value) 
       {
           myporpertyvalue = value;
       }
   
       public static object GetMyProperty(this Rectangle rect) 
       {
          return myporpertyvalue ;
       }
   }
   

   The type of a property is unknown to me so I put it like an object, you need to substitute it with the type you need, naturally.

2. Wrap Rectangle into your custom class.