From 7effd3b1584ec132a8ffa75f8769a010b2021279 Mon Sep 17 00:00:00 2001
From: Diva Canto <diva@metaverseink.com>
Date: Mon, 1 Jun 2015 15:11:30 -0700
Subject: [PATCH] Mantis #7594. This should be functionally equivalent to what
 it was, but just in case mono has a bug in List<T>.Find, here is the Linq
 equivalent of distinct-ness.

---
 .../Handlers/FetchInventory/FetchInvDescHandler.cs            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/OpenSim/Capabilities/Handlers/FetchInventory/FetchInvDescHandler.cs b/OpenSim/Capabilities/Handlers/FetchInventory/FetchInvDescHandler.cs
index 810096fa1e..f968fdccd9 100644
--- a/OpenSim/Capabilities/Handlers/FetchInventory/FetchInvDescHandler.cs
+++ b/OpenSim/Capabilities/Handlers/FetchInventory/FetchInvDescHandler.cs
@@ -28,6 +28,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using System.Reflection;
 using log4net;
 using Nini.Config;
@@ -110,8 +111,7 @@ namespace OpenSim.Capabilities.Handlers
                 }
 
                 // Filter duplicate folder ids that bad viewers may send
-                if (folders.Find(f => f.folder_id == llsdRequest.folder_id) == null)
-                    folders.Add(llsdRequest);
+                folders = (List<LLSDFetchInventoryDescendents>)folders.GroupBy(f => f.folder_id).Select(n => n.First());
             }
 
             if (folders.Count > 0)