Immutable class must have all properties read-only, much annoyed to implement

ImmutablePoint.cs

class Point
{
    public int X { get { return _x; } }
    private readonly int _x;

    public int Y { get { return _y; } }
    private readonly int _y;

    public Point(int x, int y)
    {
        _x = x;
        _y = y;
    }
}