From 3f7edc7eeed67e287f3104f085ef497f5478fed6 Mon Sep 17 00:00:00 2001
From: ryannewington <ryan@lithiumblue.com>
Date: Sat, 18 Mar 2017 09:04:53 +1100
Subject: [PATCH] Fixes issue #11 - An ArgumentNullException is thrown for the
 delete of an empty resource list

---
 .../DeleteTests.cs                               | 16 ++++++++++++++++
 .../ServiceImplementation/ResourceClient.cs      | 11 +++++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/src/Lithnet.ResourceManagement.Client.UnitTests/DeleteTests.cs b/src/Lithnet.ResourceManagement.Client.UnitTests/DeleteTests.cs
index 9500c8d..1ada1c1 100644
--- a/src/Lithnet.ResourceManagement.Client.UnitTests/DeleteTests.cs
+++ b/src/Lithnet.ResourceManagement.Client.UnitTests/DeleteTests.cs
@@ -7,6 +7,22 @@ namespace Lithnet.ResourceManagement.Client.UnitTests
     [TestClass]
     public class DeleteTests
     {
+        [TestMethod]
+        public void DeleteEmptyListResource()
+        {
+            ResourceManagementClient client = new ResourceManagementClient();
+
+            client.DeleteResources(new List<ResourceObject>());
+        }
+
+        [TestMethod]
+        public void DeleteEmptyListUniqueIdentifier()
+        {
+            ResourceManagementClient client = new ResourceManagementClient();
+
+            client.DeleteResources(new List<UniqueIdentifier>());
+        }
+
         [TestMethod]
         public void DeleteByID()
         {
diff --git a/src/Lithnet.ResourceManagement.Client/ServiceImplementation/ResourceClient.cs b/src/Lithnet.ResourceManagement.Client/ServiceImplementation/ResourceClient.cs
index f079f79..b84da6f 100644
--- a/src/Lithnet.ResourceManagement.Client/ServiceImplementation/ResourceClient.cs
+++ b/src/Lithnet.ResourceManagement.Client/ServiceImplementation/ResourceClient.cs
@@ -46,7 +46,7 @@ public void Put(IEnumerable<ResourceObject> resources)
             {
                 throw new ArgumentNullException(nameof(resources));
             }
-           
+
             using (Message message = MessageComposer.CreatePutMessage(resources.ToArray()))
             {
                 if (message == null)
@@ -107,7 +107,14 @@ public void Delete(IEnumerable<UniqueIdentifier> resourceIDs)
                 throw new ArgumentNullException(nameof(resourceIDs));
             }
 
-            using (Message message = MessageComposer.CreateDeleteMessage(resourceIDs.ToArray()))
+            UniqueIdentifier[] ids = resourceIDs.ToArray();
+
+            if (ids.Length == 0)
+            {
+                return;
+            }
+
+            using (Message message = MessageComposer.CreateDeleteMessage(ids))
             {
                 using (Message responseMessage = this.Invoke((c) => c.Delete(message)))
                 {