From 3ba911830f4eba9c3d4d7063dbacc4ee6e3c864c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20Kr=C3=BCger?= <mkrueger@xamarin.com>
Date: Fri, 22 Jul 2011 19:15:41 +0200
Subject: [PATCH] fixed bug where parameter is null.

---
 ICSharpCode.NRefactory/TypeSystem/ParameterListComparer.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ICSharpCode.NRefactory/TypeSystem/ParameterListComparer.cs b/ICSharpCode.NRefactory/TypeSystem/ParameterListComparer.cs
index e488f6def8..4540e075e4 100644
--- a/ICSharpCode.NRefactory/TypeSystem/ParameterListComparer.cs
+++ b/ICSharpCode.NRefactory/TypeSystem/ParameterListComparer.cs
@@ -17,7 +17,11 @@ namespace ICSharpCode.NRefactory.TypeSystem
 			if (px.Count != py.Count)
 				return false;
 			for (int i = 0; i < px.Count; i++) {
-				if (!px[i].Type.Equals(py[i].Type))
+				var a = px[i];
+				var b = py[i];
+				if (a == null && b == null)
+					continue;
+				if (a == null || b == null || !a.Type.Equals(b.Type))
 					return false;
 			}
 			return true;