fix: Switch to OptimizedObservableCollection for performance

Updated CalendarBase.cs to use OptimizedObservableCollection for `_columnHeaders`, `_rowHeaders`, and `_displayDates`. Imported `MyNet.Utilities.Collections`.

Changed base class in BlackoutDatesCollection.cs to `OptimizedObservableCollection<DateRange>`. Imported `MyNet.Utilities.Collections`.

Changed base class in SelectedDatesCollection.cs to `OptimizedObservableCollection<DateTime>`. Imported `MyNet.Utilities.Collections`.

Updated MyNet.Wpf.csproj to reference newer versions of `MyNet.Observable`, `MyNet.UI`, and `MyNet.Utilities` packages.

src/MyNet.Wpf/Controls/CalendarBase.cs

@@ -28,6 +28,7 @@
 using MyNet.UI.Busy.Models;
 using MyNet.UI.Collections;
 using MyNet.Utilities;
+using MyNet.Utilities.Collections;
 using MyNet.Utilities.DateTimes;
 using MyNet.Utilities.Helpers;
 using MyNet.Utilities.Localization;
@@ -69,9 +70,9 @@ public abstract class CalendarBase : ListBox
         private DateTime? _currentDate;
         private ContentControl? _accurateDateControl;
         private ContentControl? _accurateDatePreviewControl;
-        private readonly ObservableCollection<object> _columnHeaders = [];
-        private readonly ObservableCollection<object> _rowHeaders = [];
-        private readonly UiObservableCollection<CalendarItem> _displayDates = [];
+        private readonly OptimizedObservableCollection<object> _columnHeaders = [];
+        private readonly OptimizedObservableCollection<object> _rowHeaders = [];
+        private readonly OptimizedObservableCollection<CalendarItem> _displayDates = [];
         private readonly UiObservableCollection<CalendarAppointment> _appointments = [];
         private readonly SingleTaskDeferrer _refreshAppointments;
         private readonly SingleTaskDeferrer _build;

src/MyNet.Wpf/Controls/Calendars/BlackoutDatesCollection.cs

@@ -2,13 +2,12 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using System.Collections.ObjectModel;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.Linq;
-using System.Reflection.Metadata.Ecma335;
 using System.Threading;
 using MyNet.Utilities;
+using MyNet.Utilities.Collections;
 using PropertyChanged;
 
 namespace MyNet.Wpf.Controls.Calendars
@@ -17,7 +16,7 @@ namespace MyNet.Wpf.Controls.Calendars
     /// Initializes a new instance of the SchedulerBlackoutDatesCollection class.
     /// </summary>
     /// <param name="owner"></param>
-    public class BlackoutDatesCollection(CalendarBase owner) : ObservableCollection<DateRange>
+    public class BlackoutDatesCollection(CalendarBase owner) : OptimizedObservableCollection<DateRange>
     {
         #region Data
 

src/MyNet.Wpf/Controls/Calendars/SelectedDatesCollection.cs

@@ -9,6 +9,7 @@
 using System.Linq;
 using System.Threading;
 using System.Windows.Controls;
+using MyNet.Utilities.Collections;
 
 namespace MyNet.Wpf.Controls.Calendars
 {
@@ -19,7 +20,7 @@ namespace MyNet.Wpf.Controls.Calendars
     /// Initializes a new instance of the SchedulerSelectedDatesCollection class.
     /// </remarks>
     /// <param name="owner"></param>
-    public sealed class SelectedDatesCollection(CalendarBase owner) : ObservableCollection<DateTime>
+    public sealed class SelectedDatesCollection(CalendarBase owner) : OptimizedObservableCollection<DateTime>
     {
         #region Data
 

src/MyNet.Wpf/MyNet.Wpf.csproj

@@ -11,9 +11,9 @@
     <PackageReference Include="MahApps.Metro" Version="3.0.0-alpha0492" />
     <PackageReference Include="MaterialDesignThemes" Version="5.1.1-ci780" />
     <PackageReference Include="MyNet.Humanizer" Version="2.0.0" />
-    <PackageReference Include="MyNet.Observable" Version="6.0.1-pre.6" />
-    <PackageReference Include="MyNet.UI" Version="5.0.1-pre.4" />
-    <PackageReference Include="MyNet.Utilities" Version="5.2.1-pre.4" />
+    <PackageReference Include="MyNet.Observable" Version="6.0.1-pre.7" />
+    <PackageReference Include="MyNet.UI" Version="5.0.1-pre.5" />
+    <PackageReference Include="MyNet.Utilities" Version="5.2.1-pre.6" />
     <PackageReference Include="MyNet.Xaml.Html" Version="1.0.0" />
     <PackageReference Include="MyNet.Xaml.Merger.MSBuild" Version="2.0.1">
       <PrivateAssets>all</PrivateAssets>