What is the best method of printing math equations in a C# (winforms) desktop application? The format for the source is not important; I can generate almost anything with a
A potential solution for your application, if it is feasible, would be to host an online active server page that you could pass LaTeX markup and have it return an image. Obvious constraints include bandwidth, network access, and speed.
Using the CodeProject and MineTex links provided by CharlesB would be great starting points, from which a C#/ASP solution could be implemented.
Then, from winforms, you could make the request and obtain an image which could be displayed within a control, or even rendered using GDI+.