From 44e0778ae2f76d00d537bd725ada12a5ae5b1b95 Mon Sep 17 00:00:00 2001
From: jbevain <jbevain@e3ebcda4-bce8-0310-ba0a-eca2169e7518>
Date: Fri, 3 Apr 2009 10:48:28 +0000
Subject: [PATCH] 2009-04-03  Jb Evain  <jbevain@novell.com>

	* Enumerable.cs (Cast): fix for when casted enumerator is already
	of the appropriate type.



git-svn-id: svn+ssh://mono-cvs.ximian.com/source/trunk/mcs@130961 e3ebcda4-bce8-0310-ba0a-eca2169e7518
---
 class/System.Core/System.Linq/ChangeLog     | 5 +++++
 class/System.Core/System.Linq/Enumerable.cs | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/class/System.Core/System.Linq/ChangeLog b/class/System.Core/System.Linq/ChangeLog
index c45fb28df0..7eb8faa5ce 100644
--- a/class/System.Core/System.Linq/ChangeLog
+++ b/class/System.Core/System.Linq/ChangeLog
@@ -1,3 +1,8 @@
+2009-04-03  Jb Evain  <jbevain@novell.com>
+
+	* Enumerable.cs (Cast): fix for when casted enumerator is already
+	of the appropriate type.
+
 2009-03-28  Jb Evain  <jbevain@novell.com>
 
 	* Enumerable.cs: fix Intersect.
diff --git a/class/System.Core/System.Linq/Enumerable.cs b/class/System.Core/System.Linq/Enumerable.cs
index d2c98d0a19..0459dfc4d7 100644
--- a/class/System.Core/System.Linq/Enumerable.cs
+++ b/class/System.Core/System.Linq/Enumerable.cs
@@ -335,6 +335,10 @@ namespace System.Linq
 		{
 			Check.Source (source);
 
+			var actual = source as IEnumerable<TResult>;
+			if (actual != null)
+				return actual;
+
 			return CreateCastIterator<TResult> (source);
 		}
 
-- 
2.11.4.GIT