System.Windows.Rect.IntersectsWith C# (CSharp) Method

        public bool IntersectsWith(Rect rect)
        {
            if (this.IsEmpty || rect.IsEmpty)
            {
                return false;
            }
            return ((((rect.Left <= this.Right) && (rect.Right >= this.Left)) && (rect.Top <= this.Bottom)) && (rect.Bottom >= this.Top));
        }

        public ObservableCollection<GameObject> Collision(List<GameObject> attackers, List<GameObject> defenders,
            ObservableCollection<GameObject> gameObjects, int canvasHeight, out int numberOfCollisions)
        {
            var collisions = 0;

            foreach (var attacker in attackers)
            {
                var attackerRectangle = new Rect(attacker.Left, attacker.Top,
                    attacker.ImageWidth, attacker.ImageHeight);

                foreach (var defender in defenders)
                {
                    var defenderRectangle = new Rect(defender.Left, defender.Top,
                        defender.ImageWidth, defender.ImageHeight);

                    var collisionDetected = attackerRectangle.IntersectsWith(defenderRectangle);
                    if (collisionDetected)
                    {
                        gameObjects.Remove(attacker);
                        if (defender.Type != GameObjectType.Player)
                        {
                            gameObjects.Remove(defender);
                        }


                        collisions += 1;
                        break;
                    }
                }
            }


            numberOfCollisions = collisions;
            return gameObjects;
        }