This project is free to use as you see fit (for example, as a reference or starter point for a 3D plotting library in WPF). However, please be aware that it is NOT actively maintained, and has not been updated in years. I do not have time to respond to requests or questions; sorry.

WPF-SurfacePlot3D is a tiny C# library containing easy-to-use 3D surface plotting components for WPF (.NET) applications.

You can get started in as few as four lines:

var myPlot = new SurfacePlotViewModel();
myPlotView.DataContext = myPlot;
function = (x, y) => x * y;
viewModel.PlotFunction(function, -1, 1);

Check out the documentation for more information!