UnityEditor.Help.ShowHelpPage C# (CSharp) Method

        public static extern void ShowHelpPage(string page);
    }

 private void ShowHelpPageOrBrowseURL(string url, string analyticsAction)
 {
     Analytics.Track(string.Format("/WelcomeScreen/OpenURL/{0}/{1}", analyticsAction, WelcomeScreen.s_ShowCount));
     if (url.StartsWith("file"))
     {
         Help.ShowHelpPage(url);
     }
     else if (url.StartsWith("home/"))
     {
         AssetStore.Open(url);
         GUIUtility.ExitGUI();
     }
     else
     {
         Help.BrowseURL(url);
     }
 }