diff --git a/Implab/Safe.cs b/Implab/Safe.cs
--- a/Implab/Safe.cs
+++ b/Implab/Safe.cs
@@ -13,12 +13,17 @@ namespace Implab
             if (rx == null)
                 throw new ArgumentNullException("rx");
             if (!rx.IsMatch(param))
-                throw new ArgumentException(String.Format("A prameter value must match {0}", rx), name);
+                throw new ArgumentException(String.Format("The prameter value must match {0}", rx), name);
         }
 
         public static void ArgumentNotEmpty(string param, string name) {
             if (String.IsNullOrEmpty(param))
-                throw new ArgumentException("A parameter can't be empty", name);
+                throw new ArgumentException("The parameter can't be empty", name);
+        }
+
+        public static void ArgumentNotEmpty<T>(T[] param, string name) {
+            if (param == null || param.Length == 0)
+                throw new ArgumentException("The array must be not emty");
         }
 
         public static void ArgumentNotNull(object param, string name) {