demo.cs

public void Main()
{
    Gate a = new Gate(0);
    Gate b = new Gate(100);

    var ctx = new TravelContext(a, b);

    var time = ctx.Get().TravelTime;
}

/// <summary>
/// Implement a context to extract values from the game. In this case a travel context is a conenction between 2 gates
/// </summary>
public class TravelContext
    : ITravelContext
{
    private readonly Gate _a;
    private readonly Gate _b;

    public TravelContext(Gate a, Gate b)
    {
        _a = a;
        _b = b;
    }

    public decimal Distance
    {
        get { return _a.Position - _b.Position; }
    }

    public ITravelConstants Get()
    {
        return DesignValues.Get<ITravelConstants, ITravelContext>(this);
    }
}

public static class DesignValues
{
    public static TOutput Get<TOutput, TInput>(TInput travelContext)
    {
        throw new NotImplementedException();
    }
}

public interface ITravelContext
{
    decimal Distance { get; }

    ITravelConstants Get();
}

public static class Travel
{
    public static Func<ITravelConstants, decimal> Distance = a => a.TravelTime;
}

public interface ITravelConstants
{
    decimal TravelTime { get; }
}

/// <summary>
/// This is loaded up from the github repo using roslyn
/// </summary>
class TravelValues
    : ITravelConstants
{
    private readonly ITravelContext _ctx;

    public TravelValues(ITravelContext ctx)
    {
        _ctx = ctx;
    }

    public decimal TravelTime
    {
        get { return _ctx.Distance * 10; }
    }
}