Unity Crashes When Clicking Play: Script Error?

I have an issue, whenever I try to click play in the Unity Editor, the Editor freezes. This might be caused by a script error. According to this post http://answers.unity3d.com/questions/756762/unity-bug-not-responding-when-i-try-to-play.html

My Do/While script has a loop. Is there a way to fix it? I am running Windows 10 x64 with Unity 5.3.5 (latest) version.

Here is the code that may have been causing the problem:

 using UnityEngine;
 
 public static class Helper
 {
     public static float ClampAngle(float angle, float min, float max)
     {
         do 
         {
             if (angle < -360)
                 angle += 360;
             if (angle > -360)
                 angle -= 360;
         } while (angle < -360 || angle > 360);
 
         return Mathf.Clamp (angle, min, max); 
 
     }
 }