Help how can I write an array of this type

[pomaton12]

Hello, I would like to know if you can write these types of matrices, that is, place a vertical and horizontal line like in Latex, I have tried every possible way but I did not achieve my purpose. I am working in c# wpf WpfMath

M =\left[ \begin{array}{c c c |c} 1 & 2 & 2 & 2\\ 3 & 4 & 2 & 2\\ \hline 5 & 6 & 2 & 2\\ \end{array} \right]

M =\left[ \begin{array}{c c c :c} 1 & 2 & 2 & 2\\ 3 & 4 & 2 & 2\\ \hdashline 5 & 6 & 2 & 2\\ \end{array} \right]

[ForNeVeR]

I don't think this is currently supported, and I've no idea how to emulate that in the currently supported subset of markup. Created a feature request #477.

[pomaton12]

It would be great if you could incorporate it, since in latex it is used for example to generate tables, I also don't know if you can add indexes to the headers of a matrix, for example in the image I achieved that effect using wpfmath combination of matrices but the upper part It doesn't align with my matrix in each column. I don't know if that can be done or if you could implement it.

\matrix{{\matrix{y_1 & \theta_1 & y_2 & \theta_2 }} & {} \\ {\begin{pmatrix} a_1 & a_2 & a_3 & a_4\\ b_1 & b_2 & b_3 & b_4 \\ c_1 & c_2 & c_3 & c_4 \\ d_1 & d_2 & d_3 & d_4 \end{pmatrix}} & {\matrix{y_1 \\ \theta_1 \\ y_2 \\ \theta_2 }} }