Supported refresh rate for current monitor.

I am building a simple options menu for my game and I do not know how to get the refresh rates for the monitor that my game is running full-screen on.

Here is basically what I have:

 private Resolution[] resolutions;
 private Resolution currentResolution;
 private List<int> RefreshRates = new List<int>();

 void Awake()
 {
     resolutions = Screen.resolutions;
     currentResolution = Screen.currentResolution;
 }

 void Start()
 {
     for(int i = 0; i < resolutions.Length; i++)
         if(!RefreshRates.Contains(resolutions[i].refreshRate))
             RefreshRates.Add(rseolutions[i].refreshRate);
 }

This gets the refresh rates all right, but it gets them for all my monitors. Is there a way I can only get the rates for the monitor my game is running on?

Note: I have two different monitors with different refresh rates on each.

Monitor 1: 60Hz, 59Hz, 50Hz

Monitor 2: 75Hz, 60Hz