Navigating Operand City

The following is one possible solution to this challenge.

using System;

Console.WriteLine(new BlockCoordinate(4, 3) + new BlockOffset(2, 0));
Console.WriteLine(new BlockCoordinate(4, 3) + Direction.East);

public enum Direction { North, East, South, West }

public record BlockOffset(int RowOffset, int ColumnOffset);

public record BlockCoordinate(int Row, int Column)
{
    public static BlockCoordinate operator +(BlockCoordinate start, BlockOffset amount) => 
                new BlockCoordinate(start.Row + amount.RowOffset, start.Column + amount.ColumnOffset);

    public static BlockCoordinate operator +(BlockCoordinate start, Direction direction)
    {
        return start + (direction switch
        {
            Direction.North => new BlockOffset(-1, 0),
            Direction.South => new BlockOffset(+1, 0),
            Direction.West  => new BlockOffset(0, -1),
            Direction.East  => new BlockOffset(0, +1),
        });
    }
}