Error CS1061:

When I run the Game.cs on console it gives me an error!

Map.cs(17,26): error CS1061: Type TreehouseDefense.Point' does not contain a definition forX' and no extension method X' of typeTreehouseDefense.Point' could be found. Are you missing an a ssembly reference?
Point.cs(3,11): (Location of the symbol related to previous error)
Point.cs(10,13): error CS0103: The name X' does not exist in the current context Point.cs(11,13): error CS0103: The nameY' does not exist in the current context
Compilation failed: 3 error(s), 0 warnings

And I have no idea what it is asking for.

Here is Map.cs

namespace TreehouseDefense {

class Map 
{
    public readonly int Width;
    public readonly int Height;

    public Map(int width, int height)
    {
        Width = width;
        Height = height;
    }

    public bool OnMap(Point point)
    {
        return point.X >= 0 && point.X < Width &&
               point.Y >= 0 && point.Y < Height;
    }
}

}

And heres Point.cs

namespace TreehouseDefense { class Point { public readonly int x; public readonly int y;

    public Point (int x, int y)
    {
        X = x;
        Y = y;
    }

}

}