From a77b961defc6d382a37ea4b990d54aeece064b86 Mon Sep 17 00:00:00 2001
From: Matt Ward <ward.matt@gmail.com>
Date: Sat, 13 May 2006 10:07:57 +0000
Subject: [PATCH] Fixed null reference exception generated when Mono's
 DefaultCLR registry value was missing.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.0@1409 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61
---
 .../ICSharpCode.Build.Tasks/Project/MonoToolLocationHelper.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Libraries/ICSharpCode.Build.Tasks/Project/MonoToolLocationHelper.cs b/src/Libraries/ICSharpCode.Build.Tasks/Project/MonoToolLocationHelper.cs
index 038976821b..0167d57598 100644
--- a/src/Libraries/ICSharpCode.Build.Tasks/Project/MonoToolLocationHelper.cs
+++ b/src/Libraries/ICSharpCode.Build.Tasks/Project/MonoToolLocationHelper.cs
@@ -172,7 +172,9 @@ namespace ICSharpCode.Build.Tasks
 				if (key != null) {
 					string readValue = (string)key.GetValue(name);
 					key.Close();
-					return readValue;
+					if (readValue != null) {
+						return readValue;
+					}
 				}
 			} catch (SecurityException) { }