Basically, you would need to create a LaTex WPF component from scratch, but please look at this CodeProject article:
A WPF TikZ Editor (TikzEdt)[
^].
Even though this is the editor, but your problem of rendering LaTex can be considered as a sub-problem of a problem solved in this article.
Maybe you can find something else:
http://bit.ly/1yVQy4u[
^].
—SA