Crash due to "Item with the same key" error for BSA files on load

[focustense]

Copied from the Nexus comments:

System.AggregateException: One or more errors occurred. (An item with the same key has already been added. Key: FortDawnguardImmersive - Textures.bsa)
 ---> System.ArgumentException: An item with the same key has already been added. Key: FortDawnguardImmersive - Textures.bsa
   at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
   at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer)
   at Focus.Apps.EasyNpc.GameData.Files.ModPluginMap.<>c__DisplayClass3_0.<ForDirectory>b__4()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.<>c.<.cctor>b__277_0(Object obj)
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.WaitAllCore(Task[] tasks, Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.WaitAll(Task[] tasks)
   at System.Threading.Tasks.Parallel.Invoke(ParallelOptions parallelOptions, Action[] actions)
--- End of stack trace from previous location ---
   at System.Threading.Tasks.Parallel.ThrowSingleCancellationExceptionOrOtherException(ICollection exceptions, CancellationToken cancelToken, Exception otherException)
   at System.Threading.Tasks.Parallel.Invoke(ParallelOptions parallelOptions, Action[] actions)
   at System.Threading.Tasks.Parallel.Invoke(Action[] actions)
   at Focus.Apps.EasyNpc.GameData.Files.ModPluginMap.ForDirectory(String modRootDirectory, IModResolver modResolver, IEnumerable`1 pluginNames, IEnumerable`1 archiveNames)
   at Focus.Apps.EasyNpc.Mutagen.MutagenModPluginMapFactory.CreateForDirectory(String modRootDirectory)
   at Focus.Apps.EasyNpc.GameData.Files.ModPluginMapFactoryExtensions.DefaultMap(IModPluginMapFactory modPluginMapFactory)
   at Focus.Apps.EasyNpc.Profile.NpcConfiguration`1.SetFacePlugin(NpcOverrideConfiguration`1 faceConfig, Boolean detectFaceMod)
   at Focus.Apps.EasyNpc.Profile.NpcConfiguration`1.SetFacePlugin(String pluginName, Boolean detectFaceMod)
   at Focus.Apps.EasyNpc.Profile.NpcConfiguration`1.Reset(Boolean defaults, Boolean faces)
   at Focus.Apps.EasyNpc.Profile.NpcConfiguration`1..ctor(INpc`1 npc, IModPluginMapFactory modPluginMapFactory, IProfileRuleSet ruleSet)
   at Focus.Apps.EasyNpc.Profile.ProfileViewModel`1..ctor(IEnumerable`1 npcs, IModPluginMapFactory modPluginMapFactory, IEnumerable`1 loadedPluginNames, IEnumerable`1 masterNames, ProfileEventLog profileEventLog)
   at Focus.Apps.EasyNpc.Main.MainViewModel`1.<>c__DisplayClass55_0.<.ctor>b__1()
   at Focus.Apps.EasyNpc.Main.LoaderViewModel`1.ConfirmPlugins()
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__140_0(Object state)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run()
   at Focus.Apps.EasyNpc.App.Main()

[focustense]

I'm making an educated guess that this is due to the .GroupBy not using a string comparer, while .ToDictionary does use a string comparer - so, possibly, two mods containing the same archive with different letter case are being received into two different groups. Simple fix is to update the .GroupBy clauses (if the diagnosis is correct).