Concat​(AngouriMath.​MathS.​Matrices.​Direction,​AngouriMath.​Entity.​Matrix[])

using System;
using static AngouriMath.MathS;
using static AngouriMath.Entity;

Matrix A = @"
[[1, 2, 3]]
";
Matrix B = @"
[[1, 2, 3],
 [4, 5, 6]]";
Matrix C = @"
[[2, 4, 1],
 [4, 1, 2],
 [a, x, y]]
";
Console.WriteLine(
    Matrices.Concat(Matrices.Direction.Vertical, A, B, C)
    .ToString(multilineFormat: true)
 );
Console.WriteLine("----------------------------");
Matrix D = "[1, 2, 3]";
Matrix E = "[4, 5, 6]";
Console.WriteLine(D.ToString(multilineFormat: true));
Console.WriteLine(E.ToString(multilineFormat: true));
Console.WriteLine(
    Matrices.Concat(Matrices.Direction.Horizontal, D, E)
    .ToString(multilineFormat: true)
);

Matrix[6 x 3]
1   2   3   
1   2   3   
4   5   6   
2   4   1   
4   1   2   
a   x   y   
----------------------------
Matrix[3 x 1]
1   
2   
3   
Matrix[3 x 1]
4   
5   
6   
Matrix[3 x 2]
1   4   
2   5   
3   6