using System;

using System.Linq;

public class Program

{

    public class Vector3 {

        public int X;

        public int Y;

        public Vector3(int[] vals){

            X= vals[0];

            Y= vals[1];

        }

    }

    public static void Main()

    {

        int[][] test = { 

            new[] {0,1},

            new[] {1,1},

            new[] {0,0}, 

            new[] {1,0}

        };

        Func<int[], Vector3> vertex = (int[] point) => new Vector3(point);

        var q = test.Select( x => vertex(x)).ToList();

        q.ForEach(i => Console.WriteLine( string.Join(" ", i.X, i.Y)));

​

    }

}

​