The following examples show how you can plot a function F(x, y) = 0.

• Use delegates to pass a method's address to another method in C#
• Plot the equation of a function of two variables in C#

This example uses the same techniques to plot level curves. For a function z = F(x, y), the program simply plots the function F(x, y) - z = 0 for different z values. It makes curves red when z < 0, blue when z > 0, and black when z = 0.

Note that this technique is non-analytic so you don't need to understand the shape of the function, find partial derivatives for it, etc.

See the previous examples and the code for details.