Get available refresh rates

@73cn0109y I know it's 5 years old question but i'll answer it anyway.

Short answer :

NO

Long asnwer :

NO, but you can get all supported Screen Resolutions and it's supported refresh rate and store all the refresh rate to a variable This is how you do it

 // C# Snippet
 var resolutions = Screen.resolutions;
 var refreshRates = new Int32 [resolutions.Length];
 
 for (var c = 0; c < refreshRates.Length; c++)
     refreshRates[c] = resolutions[c].refreshRate;

NOTE : This is not recommended because refresh rate also rely on to the resolution itself.