[Bug]: Krypton.Navigator throws exception in Initialise when attempting to `EndInit()`

[Smurf-IV]

Using Krypton.Navigator.Nightly

• 80.23.10.275-alpha
• 80.23.9.268-beta - canary

Win 10 22H2 VS 17.7.5 .net 7.0.12

[Smurf-IV]

Does not occur Canary versions :

• 80.23.1.23-beta
• 80.23.3.79-beta

Note: The following have creation object problems !!

• 80.23.5.142-beta
• 80.23.4.114-beta

[Smurf-IV]

Does not seem to appear in the demo apps. Will perform a clean create (As per the OP bug raised against)

[Smurf-IV]

Creating the project clean with 80.23.9.268-beta - canary allows it to work as expected !!??

[Smurf-IV]

Hmm.. Also works when recreating with 80.23.10.275-alpha Will have to go back to the Dev Machine (Monday onwards) and see what is different.

[Smurf-IV]

t throws when "One" (Not sure which yet) settings are used in the designer:

            this.kryptonNavigator1.Bar.BarMapExtraText = Krypton.Navigator.MapKryptonPageText.None;
            this.kryptonNavigator1.Bar.BarMapImage = Krypton.Navigator.MapKryptonPageImage.Small;
            this.kryptonNavigator1.Bar.BarMapText = Krypton.Navigator.MapKryptonPageText.TextTitle;
            this.kryptonNavigator1.Bar.BarMultiline = Krypton.Navigator.BarMultiline.Singleline;
            this.kryptonNavigator1.Bar.BarOrientation = Krypton.Toolkit.VisualOrientation.Top;
            this.kryptonNavigator1.Bar.CheckButtonStyle = Krypton.Toolkit.ButtonStyle.Standalone;
            this.kryptonNavigator1.Bar.ItemAlignment = Krypton.Toolkit.RelativePositionAlign.Near;
            this.kryptonNavigator1.Bar.ItemMaximumSize = new System.Drawing.Size(200, 200);
            this.kryptonNavigator1.Bar.ItemMinimumSize = new System.Drawing.Size(20, 20);
            this.kryptonNavigator1.Bar.ItemOrientation = Krypton.Toolkit.ButtonOrientation.Auto;
            this.kryptonNavigator1.Bar.ItemSizing = Krypton.Navigator.BarItemSizing.SameHeight;
            this.kryptonNavigator1.Bar.TabBorderStyle = Krypton.Toolkit.TabBorderStyle.SlantEqualNear;
            this.kryptonNavigator1.Bar.TabStyle = Krypton.Toolkit.TabStyle.HighProfile;
            this.kryptonNavigator1.Button.ButtonDisplayLogic = Krypton.Navigator.ButtonDisplayLogic.None;
            this.kryptonNavigator1.Button.CloseButtonAction = Krypton.Navigator.CloseButtonAction.RemovePageAndDispose;
            this.kryptonNavigator1.Button.CloseButtonDisplay = Krypton.Navigator.ButtonDisplay.Hide;
            this.kryptonNavigator1.Button.ContextButtonAction = Krypton.Navigator.ContextButtonAction.None;
            this.kryptonNavigator1.Button.ContextButtonDisplay = Krypton.Navigator.ButtonDisplay.Hide;
            this.kryptonNavigator1.Button.ContextMenuMapImage = Krypton.Navigator.MapKryptonPageImage.Small;
            this.kryptonNavigator1.Button.ContextMenuMapText = Krypton.Navigator.MapKryptonPageText.TextTitle;
            this.kryptonNavigator1.Button.NextButtonAction = Krypton.Navigator.DirectionButtonAction.ModeAppropriateAction;
            this.kryptonNavigator1.Button.NextButtonDisplay = Krypton.Navigator.ButtonDisplay.Logic;
            this.kryptonNavigator1.Button.PreviousButtonAction = Krypton.Navigator.DirectionButtonAction.ModeAppropriateAction;
            this.kryptonNavigator1.Button.PreviousButtonDisplay = Krypton.Navigator.ButtonDisplay.Logic;
            this.kryptonNavigator1.ControlKryptonFormFeatures = false;
            this.kryptonNavigator1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.kryptonNavigator1.Enabled = false;
            this.kryptonNavigator1.Location = new System.Drawing.Point(0, 0);
            this.kryptonNavigator1.Name = "kryptonNavigator1";
            this.kryptonNavigator1.NavigatorMode = Krypton.Navigator.NavigatorMode.BarRibbonTabGroup;
            this.kryptonNavigator1.Owner = null;
            this.kryptonNavigator1.PageBackStyle = Krypton.Toolkit.PaletteBackStyle.ControlClient;

[Smurf-IV]

the following is the fix for this issue:

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (_mementos is not null)
                {
                    // Dispose of all the mementos in the array
                    foreach (IDisposable? memento in _mementos)
                    {
                        // https://github.com/Krypton-Suite/Standard-Toolkit/issues/1146
                        memento?.Dispose();
                    }

                    _mementos = null!;
                }

                if (ButtonSpecManager is not null)
                {
                    ButtonSpecManager.Destruct();
                    ButtonSpecManager = null!;
                }
            }

            base.Dispose(disposing);
        }