You can download the free HMI symbol library from www.hmisymbols.com.
The following video presentations describe the HMI symbol library and how to use it in a WPF application. The symbols can also be used in WinForm and Web applications as well.
Quick introduction to HMI Symbols: https://www.opcsystems.com/hmisymbolsfast_video.htm
Detailed demonstration of using HMI symbols to develop WPF application: