Fix chunkify

ConfigurationTests/Program.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using ZeroLevel;
 
 namespace ConfigurationTests
@@ -8,6 +10,20 @@ namespace ConfigurationTests
 
         static void Main(string[] args)
         {
+            var list = new List<int>();
+            for (int i = 0; i < 100; i++)
+            {
+                list.Add(i);
+            }
+            var collection = list.Chunkify(6).ToList();
+            foreach (var t in collection)
+            {
+                Console.WriteLine(string.Join("; ", t.Select(n => n.ToString("D2"))));
+            }
+            Console.ReadKey();
+            return;
+
+
             var config = Configuration.ReadFromIniFile("config.ini").Bind<AppConfig>();
             Console.WriteLine(config.Url);
             Console.WriteLine(config.BatchSize);

ZeroLevel/Services/Extensions/EnumerableExtensions.cs

@@ -32,23 +32,20 @@ namespace ZeroLevel
             return !IsEmpty(collection);
         }
 
-        public static IEnumerable<T> Batch<T>(this IEnumerator<T> source, int size)
-        {
-            yield return source.Current;
-            for (var i = 1; i < size && source.MoveNext(); i++)
-            {
-                yield return source.Current;
-            }
-        }
-
         public static IEnumerable<IEnumerable<T>> Chunkify<T>(this IEnumerable<T> source, int size)
         {
-            using (var enumerator = source.GetEnumerator())
+            if (source == null)
             {
-                while (enumerator.MoveNext())
+                yield break;
+            }
+            if (size <= 0)
             {
-                    yield return Batch(enumerator, size);
+                throw new ArgumentException("chunkSize must be greater than 0.");
             }
+            while (source.Any())
+            {
+                yield return source.Take(size);
+                source = source.Skip(size);
             }
         }
     }