How to compare two list in C#

var result = pointsA.Union(pointsB).Where(w => !(pointsA.Contains(w) && pointsB.Contains(w)));

public class Point
{
   private int x = 0;
   private int y = 0;
   
   public Point()
   {
   	//default constructor
   }
   
   public Point(int _x, int _y)
   {
        x = _x;
        y = _y;
   }
   
   public int X
   {
   	get { return x; }
	set { x = value; }
   }
   
   public int Y
   {
   	get { return y; }
	set { y = value; }
   }

   public override bool Equals(Object obj) 
   {
      // Check for null values and compare run-time types.
      if (obj == null || GetType() != obj.GetType()) 
         return false;

      Point p = (Point)obj;
      return (x == p.x) && (y == p.y);
   }

   public override int GetHashCode() 
   {
      return x ^ y;
   }
}

void Main()
{
	List<Point> pointsA = new List<Point>();
	pointsA.Add(new Point(5,5));
	pointsA.Add(new Point(10,8));
	
	List<Point> pointsB = new List<Point>();
	pointsB.Add(new Point(5,5));
	pointsB.Add(new Point(9,8));
	
	var result = pointsA.Union(pointsB) //union 
			.Except( //except
				pointsA.Intersect(pointsB) //common
				);

	
}

X  Y
10 8 
9  8 

for (int i= 1; i < ListA.length; i++) {
	if (ListA[i] != ListB[i]) {
		// diferent, do what you want
		}
	}

List<int> equalVal = new List<int>();
equal.AddRange(list1.FindAll(x => list2.Contains(x)));