property create the GroupBy iterator

svn path=/trunk/mcs/; revision=106533

1 files changed, 6 insertions, 1 deletions

diff --git a/mcs/class/System.Core/System.Linq/Enumerable.cs b/mcs/class/System.Core/System.Linq/Enumerable.cs
index d8ada72df5c..3ac3fc5a4a2 100644
--- a/mcs/class/System.Core/System.Linq/Enumerable.cs
+++ b/mcs/class/System.Core/System.Linq/Enumerable.cs
@@ -633,6 +633,12 @@ namespace System.Linq
 		{
 			Check.SourceAndKeySelector (source, keySelector);
 
+			return CreateGroupByIterator (source, keySelector, comparer);
+		}
+
+		static IEnumerable<IGrouping<TKey, TSource>> CreateGroupByIterator<TSource, TKey> (this IEnumerable<TSource> source,
+			Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer)
+		{
 			Dictionary<TKey, List<TSource>> groups = new Dictionary<TKey, List<TSource>> ();
 			List<TSource> nullList = new List<TSource> ();
 			int counter = 0;
@@ -670,7 +676,6 @@ namespace System.Linq
 			}
 		}
 
-
 		public static IEnumerable<IGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement> (this IEnumerable<TSource> source,
 			Func<TSource, TKey> keySelector, Func<TSource, TElement> elementSelector)
 		{