Need Pin Interrupts library for c# mono raspberry pi

Question

HI , we are developing an application which requires to read the status of pin on raspberry pi board frequently (long polling) is there any library (dll) supports pin interrupts ? ie., if the pin is HIGH / LOW it should rise an event. i found this library for .net (https://github.com/danriches/WiringPi.Net) could any one please help me how to use that library ?