Space Engineers - Not Working Generic Class Example

void Main(string arg)
{
    Echo("Creating Collector");
    Collector collector = new Collector(new Vector3D(0), new Vector3D(100000));

    Echo("Accessing elements");
    Echo(string.Format("> Position\nLinear: {0} | {1}\nAngular: {2} | {3}",
            collector.Position.Linear.Min,
            collector.Position.Linear.Max,
            collector.Position.Angular.Min,
            collector.Position.Angular.Max
        ));
    Echo(string.Format("> Velocity\nLinear: {0} | {1}\nAngular: {2} | {3}",
            collector.Velocity.Linear.Min,
            collector.Velocity.Linear.Max,
            collector.Velocity.Angular.Min,
            collector.Velocity.Angular.Max
        ));
}

public class Collector
{
    public LinearAngular<Vector3D> Position;
    public LinearAngular<Vector3D> Velocity;

    public Collector(Vector3D min, Vector3D max)
    {
        this.Position = new LinearAngular<Vector3D>(min, max);
        this.Velocity = new LinearAngular<Vector3D>(min, max);
    }
}

public class LinearAngular<T>
{
    public MinMax<T> Linear;
    public MinMax<T> Angular;

    public LinearAngular(T min, T max)
    {
        this.Linear = new MinMax<T>(min, max);
        this.Angular = new MinMax<T>(min, max);
    }
}

public class MinMax<T>
{
    public T Min;
    public T Max;

    public MinMax(T min, T max)
    {
        this.Min = min;
        this.Max = max;
    }
}