Index: Core/Common/src/Core.Common.Base/Observable.cs
===================================================================
diff -u -re823dc6f52bf6a01f421c69b95a07e6258ec33de -rad04a3f7bc413808f2d8b8f7ac60270e794dd133
--- Core/Common/src/Core.Common.Base/Observable.cs	(.../Observable.cs)	(revision e823dc6f52bf6a01f421c69b95a07e6258ec33de)
+++ Core/Common/src/Core.Common.Base/Observable.cs	(.../Observable.cs)	(revision ad04a3f7bc413808f2d8b8f7ac60270e794dd133)
@@ -23,7 +23,7 @@
         public void NotifyObservers()
         {
             // Iterate through a copy of the list of observers; an update of one observer might result in detaching another observer (which will result in a "list modified" exception over here otherwise)
-            foreach (var observer in observers.ToList())
+            foreach (var observer in observers.ToArray())
             {
                 // Ensure the observer is still part of the original list of observers
                 if (!observers.Contains(observer))
Index: Core/Common/src/Core.Common.Base/ObservableList.cs
===================================================================
diff -u -re823dc6f52bf6a01f421c69b95a07e6258ec33de -rad04a3f7bc413808f2d8b8f7ac60270e794dd133
--- Core/Common/src/Core.Common.Base/ObservableList.cs	(.../ObservableList.cs)	(revision e823dc6f52bf6a01f421c69b95a07e6258ec33de)
+++ Core/Common/src/Core.Common.Base/ObservableList.cs	(.../ObservableList.cs)	(revision ad04a3f7bc413808f2d8b8f7ac60270e794dd133)
@@ -24,7 +24,7 @@
         public void NotifyObservers()
         {
             // Iterate through a copy of the list of observers; an update of one observer might result in detaching another observer (which will result in a "list modified" exception over here otherwise)
-            foreach (var observer in observers.ToList())
+            foreach (var observer in observers.ToArray())
             {
                 // Ensure the observer is still part of the original list of observers
                 if (!observers.Contains(observer))
Index: Core/Common/src/Core.Common.Base/Plugin/ApplicationCore.cs
===================================================================
diff -u -ra29fec51f51cad7d19ea534636d15c84bf52ccec -rad04a3f7bc413808f2d8b8f7ac60270e794dd133
--- Core/Common/src/Core.Common.Base/Plugin/ApplicationCore.cs	(.../ApplicationCore.cs)	(revision a29fec51f51cad7d19ea534636d15c84bf52ccec)
+++ Core/Common/src/Core.Common.Base/Plugin/ApplicationCore.cs	(.../ApplicationCore.cs)	(revision ad04a3f7bc413808f2d8b8f7ac60270e794dd133)
@@ -22,7 +22,7 @@
         }
 
         /// <summary>
-        /// This method adds <see cref="applicationPlugin"/> to the collection of <see cref="ApplicationPlugin"/> plugins.
+        /// This method adds <see cref="applicationPlugin"/> to the <see cref="ApplicationCore"/>.
         /// Additionally, the provided <see cref="ApplicationPlugin"/> is activated.
         /// </summary>
         /// <param name="applicationPlugin">The <see cref="ApplicationPlugin"/> to add and activate.</param>
@@ -34,7 +34,7 @@
         }
 
         /// <summary>
-        /// This method removes <see cref="applicationPlugin"/> from the collection of <see cref="ApplicationPlugin"/> plugins.
+        /// This method removes <see cref="applicationPlugin"/> from the <see cref="ApplicationCore"/>.
         /// Additionally, the provided <see cref="ApplicationPlugin"/> is deactivated.
         /// </summary>
         /// <param name="applicationPlugin">The <see cref="ApplicationPlugin"/> to remove and deactivate.</param>
@@ -46,10 +46,10 @@
         }
 
         /// <summary>
-        /// This method returns a collection of <see cref="IFileImporter"/> that support the <paramref name="target"/>.
+        /// This method returns an enumeration of <see cref="IFileImporter"/> that support the <paramref name="target"/>.
         /// </summary>
-        /// <param name="target">The target to get the collection of supported <see cref="IFileImporter"/> for.</param>
-        /// <returns>The collection of supported <see cref="IFileImporter"/>.</returns>
+        /// <param name="target">The target to get the enumeration of supported <see cref="IFileImporter"/> for.</param>
+        /// <returns>The enumeration of supported <see cref="IFileImporter"/>.</returns>
         public IEnumerable<IFileImporter> GetSupportedFileImporters(object target)
         {
             if (target == null)
@@ -64,10 +64,10 @@
         }
 
         /// <summary>
-        /// This method returns a collection of <see cref="IFileExporter"/> that support the <paramref name="source"/>.
+        /// This method returns an enumeration of <see cref="IFileExporter"/> that support the <paramref name="source"/>.
         /// </summary>
-        /// <param name="source">The source to get the collection of supported <see cref="IFileExporter"/> for.</param>
-        /// <returns>The collection of supported <see cref="IFileExporter"/>.</returns>
+        /// <param name="source">The source to get the enumeration of supported <see cref="IFileExporter"/> for.</param>
+        /// <returns>The enumeration of supported <see cref="IFileExporter"/>.</returns>
         public IEnumerable<IFileExporter> GetSupportedFileExporters(object source)
         {
             if (source == null)
@@ -82,10 +82,10 @@
         }
 
         /// <summary>
-        /// This method returns a collection of <see cref="DataItemInfo"/> that are supported for <paramref name="owner"/>.
+        /// This method returns an enumeration of <see cref="DataItemInfo"/> that are supported for <paramref name="owner"/>.
         /// </summary>
-        /// <param name="owner">The owner to get the collection of supported <see cref="DataItemInfo"/> for.</param>
-        /// <returns>The collection of supported <see cref="DataItemInfo"/>.</returns>
+        /// <param name="owner">The owner to get the enumeration of supported <see cref="DataItemInfo"/> for.</param>
+        /// <returns>The enumeration of supported <see cref="DataItemInfo"/>.</returns>
         public IEnumerable<DataItemInfo> GetSupportedDataItemInfos(object owner)
         {
             if (owner == null)
@@ -99,7 +99,7 @@
 
         public virtual void Dispose()
         {
-            foreach (var plugin in plugins.ToList())
+            foreach (var plugin in plugins.ToArray())
             {
                 RemovePlugin(plugin);
             }
Index: Core/Common/src/Core.Common.Base/Plugin/ApplicationPlugin.cs
===================================================================
diff -u -rd1e069321cba9d3b92f873fdd18e393a20659542 -rad04a3f7bc413808f2d8b8f7ac60270e794dd133
--- Core/Common/src/Core.Common.Base/Plugin/ApplicationPlugin.cs	(.../ApplicationPlugin.cs)	(revision d1e069321cba9d3b92f873fdd18e393a20659542)
+++ Core/Common/src/Core.Common.Base/Plugin/ApplicationPlugin.cs	(.../ApplicationPlugin.cs)	(revision ad04a3f7bc413808f2d8b8f7ac60270e794dd133)
@@ -25,27 +25,27 @@
         }
 
         /// <summary>
-        /// This method returns a collection of <see cref="IFileImporter"/>.
+        /// This method returns an enumeration of <see cref="IFileImporter"/>.
         /// </summary>
-        /// <returns>The collection of <see cref="IFileImporter"/> provided by the <see cref="ApplicationPlugin"/>.</returns>
+        /// <returns>The enumeration of <see cref="IFileImporter"/> provided by the <see cref="ApplicationPlugin"/>.</returns>
         public virtual IEnumerable<IFileImporter> GetFileImporters()
         {
             yield break;
         }
 
         /// <summary>
-        /// This method returns a collection of <see cref="IFileExporter"/>.
+        /// This method returns an enumeration of <see cref="IFileExporter"/>.
         /// </summary>
-        /// <returns>The collection of <see cref="IFileExporter"/> provided by the <see cref="ApplicationPlugin"/>.</returns>
+        /// <returns>The enumeration of <see cref="IFileExporter"/> provided by the <see cref="ApplicationPlugin"/>.</returns>
         public virtual IEnumerable<IFileExporter> GetFileExporters()
         {
             yield break;
         }
 
         /// <summary>
-        /// This method returns a collection of <see cref="DataItemInfo"/>.
+        /// This method returns an enumeration of <see cref="DataItemInfo"/>.
         /// </summary>
-        /// <returns>The collection of <see cref="DataItemInfo"/> provided by the <see cref="ApplicationPlugin"/>.</returns>
+        /// <returns>The enumeration of <see cref="DataItemInfo"/> provided by the <see cref="ApplicationPlugin"/>.</returns>
         public virtual IEnumerable<DataItemInfo> GetDataItemInfos()
         {
             yield break;