Remove X Direction Grid Lines

I am using the Helixtoolkit NuGet package in my Visual Studio C# program and it's working well. I am generating a grid with grid = new GridLinesVisual3D(); but I do not want the grid lines that go in the X Direction, I would like to have grid lines in only the Y Direction. I have looked a the GridLinesVisual3D.cs file and I know exactly what needs to be changed, but I don't know how to change it. Because I am loading in the entire package to Visual Studio, I can't see the individual source files in the program to edit them.

So my question is, what is the best way to go about removing the lines in the X direction.

Thanks.