Have some troubles when I'm trying to draw 3d function with IlNumerics

Question

Hi guys I have some problems when I'm trying to draw 3D function with c#

My code:

string expr = "Abs(x)+Abs(y)";
int pointX = 43;
int pointNumber = pointX * pointX;
double[] XX = new double[pointX];
double[] YY = new double[pointX];
double[,] ZZ = new double[pointX, pointX];
for (int i = 0; i < pointX; i++)
{
    double d = (double)i;
    XX[i] = YY[i] = -10 + 20 * (d / (pointX - 1));
    if (XX[i] == 0) { XX[i] = 0.01; YY[i] = 0.01; }
}
Parser p = new Parser();
for (int j = 0; j < pointX; j++)
{
    for (int k = 0; k < pointX; k++)
    {
        Hashtable h = new Hashtable();
        h.Add("x", XX[j]);
        h.Add("y", YY[k]);
        ZZ[j, k] = p.Parse(expr, h);

    }
}

Then in internet I tomot give me this piece of code for drawing 3d function with IlNumerics:

       This code is too old

But when I'm trying to run the code the CIL give me some error because meshgrid now is a different method and IlSurfaceGraph and m_panel2.Graphs.AddSurfGraph don't exist anymore.

How can I solve this?

EDIT 1

I have read again the documentation and I have tryed this code for creating the 3D chart:

ILArray<float> Z = ZZ;
ilPanel1.Scene = new ILScene() {
    new ILPlotCube(twoDMode: false) {
        new ILSurface(ZZ) {
            UseLighting = true
        }
    }
};
ilPanel1.Scene.First<ILPlotCube>().Rotation = Matrix4.Rotation(
    new Vector3(1f, 0.23f, 1), 0.7f);

ILArray is not empty and the result is this: I don't understand why the Graph is empty...

Number of float in matrix 1849. Here you can see all the output(It's too long so I have posted on pastebin). The example works perfectly there are no problem with they.