From f29bf6f3a42fd6a5597356594a414b1c86134892 Mon Sep 17 00:00:00 2001
From: Matt Ward <ward.matt@gmail.com>
Date: Sun, 15 May 2011 18:43:32 +0100
Subject: [PATCH] Make package repository cache thread safe.

---
 .../Project/Src/PackageRepositoryCache.cs                  | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/AddIns/Misc/PackageManagement/Project/Src/PackageRepositoryCache.cs b/src/AddIns/Misc/PackageManagement/Project/Src/PackageRepositoryCache.cs
index 3d33e894d9..2e879bdcbb 100644
--- a/src/AddIns/Misc/PackageManagement/Project/Src/PackageRepositoryCache.cs
+++ b/src/AddIns/Misc/PackageManagement/Project/Src/PackageRepositoryCache.cs
@@ -2,6 +2,7 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using NuGet;
 
@@ -13,8 +14,8 @@ namespace ICSharpCode.PackageManagement
 		RegisteredPackageSources registeredPackageSources;
 		IList<RecentPackageInfo> recentPackages;
 		IRecentPackageRepository recentPackageRepository;
-		Dictionary<PackageSource, IPackageRepository> repositories =
-			new Dictionary<PackageSource, IPackageRepository>();
+		ConcurrentDictionary<PackageSource, IPackageRepository> repositories =
+			new ConcurrentDictionary<PackageSource, IPackageRepository>();
 		
 		public PackageRepositoryCache(
 			ISharpDevelopPackageRepositoryFactory factory,
@@ -57,7 +58,7 @@ namespace ICSharpCode.PackageManagement
 		IPackageRepository CreateNewCachedRepository(PackageSource packageSource)
 		{
 			IPackageRepository repository = factory.CreateRepository(packageSource);
-			repositories.Add(packageSource, repository);
+			repositories.TryAdd(packageSource, repository);
 			return repository;
 		}