DistanceTo method is giving error!

using System;
namespace TreehouseDefense
{
    class Point
    {
        public readonly int X;
        public readonly int Y;

        public Point(int x, int y)
        {
            X = x;
            Y = y;
        }
        public int DistanceTo(int x, int y)
        {
            int xDiff = X - x;
            int yDiff = Y - y;

            int xDiffSquared = xDiff * xDiff;
            int yDiffSquared = yDiff * yDiff;
        }
    }
}

Point.cs(14,20): error CS0161: 'Point.DistanceTo(int, int)': not all code paths return
e [/Users/azimjonsodikov/workspace/BackEnd/Csharp/exercises/DefenseGame/DefenseGame.cs