Thanks for all the feedback guys! I'm starting to get on the right track.
I still have a question about my while loop though. Basically, in my interrupt, if J1pin4 reads true, U1TLED is set to true and the LED will light. However, I am looking to continuously blink the LED if false is read at J1pin4. I figured a while loop would be best to use for this, but I'm not sure if the way I have it set up is just going to put me in a continuous loop.
else if (J1pin4.Read() == false) { while (J1pin4.Read() == false) { U1TLED.Write(true); Thread.Sleep(100); U1TLED.Write(false); Thread.Sleep(100); if (U1TestSwitch.Interrupt == Port.InterruptMode.InterruptEdgeLow) { break; } } }