diff --git a/IOB-WIN/IobGeneric.cs b/IOB-WIN/IobGeneric.cs
index 8b8d1b7c..e55d25fc 100644
--- a/IOB-WIN/IobGeneric.cs
+++ b/IOB-WIN/IobGeneric.cs
@@ -2521,13 +2521,13 @@ namespace IOB_WIN
         return answ;
       }
     }
-    public string GetMACAddress()
+    public static string GetMACAddress()
     {
       NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
       String sMacAddress = string.Empty;
       foreach (NetworkInterface adapter in nics)
       {
-        if (sMacAddress == String.Empty)// only return MAC Address from first card  
+        if (string.IsNullOrEmpty(sMacAddress))// only return MAC Address from first card  
         {
           IPInterfaceProperties properties = adapter.GetIPProperties();
           //sMacAddress = adapter.GetPhysicalAddress().ToString();
@@ -3319,8 +3319,6 @@ namespace IOB_WIN
           // verifico se la funzione SIA abilitata
           if (enableSendPzCountBlock)
           {
-            //// rileggo qta da server...
-            //pzCntReload(true);
             int delta = lastCountCNC - contapezzi;
             // se è abilitata verifico differenza: se ho DELTA > minSendPzCountBlock --> invio un blocco <= maxSendPzCountBlock
             if (delta > minSendPzCountBlock)