Rect and Point Extension Methods

I'm currently working on multiple Windows Phone projects and don't have much time for longer blog posts, but I just wanted to get this out.
For one of the projects I need to calculate some simple vector arithmetics like the Euclidean distance. I also need other properties of the Point and Rect structs that aren't built-in the Silverlight framework. As you might know I'm a huge fan of extension methods for extending built-in functionality (1, 2). That's why I wrote a few extension methods for the Point and Rect structs that might come handy.

Rect

public static class RectExtensions
{   
   // Calculates the center point of this rectangle.
   public static Point Center(this Rect rect)
   {
      return new Point(rect.X + rect.Width * 0.5, rect.Y + rect.Height * 0.5);
   }

   // Tests if this rectangle intersects with the other.
   public static bool IntersectsWith(this Rect rect, Rect other)
   {
      // Test for separating axis
      if (other.Bottom < rect.Top || other.Right < rect.Left 
       || other.Top > rect.Bottom || other.Left > rect.Right)
      {
         return false;
      }
      return true;
   }
}

The usage should be pretty obvious.

Rect r = new Rect(0, 0, 200, 300);
Point center = r.Center();

bool isIntersecting = r.IntersectsWith(new Rect(500, 600, 100, 50));

Point

public static class PointExtensions
{
   // Calculates the distance vector of the points.
   public static Point Distance(this Point p1, Point p2)
   {
      return new Point(p1.X - p2.X, p1.Y - p2.Y);
   }

   // Calculates the length of the vector.
   public static double Length(this Point p)
   {
      return Math.Sqrt(p.X * p.X + p.Y * p.Y);
   }

   // Calculates the square length of the vector.
   public static double LengthSquare(this Point p)
   {
      return p.X * p.X + p.Y * p.Y;
   }
}

The squared length saves some cycles if this information is only needed for comparison.

Point p1 = new Point(200, 300);
Point p2 = new Point(400, 500);
Point distance = p1.Distance(p2);

double length = distance.Length();
double lengthSq = distance.LengthSquare();
length = Math.Sqrt(lengthSq);

Source Code
You can download the two C# files from here.