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KeyNotFoundException occurs when moving mouse cursor over main RibbonForm after closing the child RibbonForm. This occurs when quickly moving the cursor over the main RibbonForm.
Replication Steps:
at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Syncfusion.Windows.Forms.Tools.RibbonPanel.OnMouseMove(MouseEventArgs e) in D:\Volume 1, 2020\Support sources\Tools.Windows\tools-windows\Windows\Tools.Windows\Src\Controls\RibbonPanel\RibbonPanel.cs:line 1044
at System.Windows.Forms.Control.WmMouseMove(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at Syncfusion.Windows.Forms.Tools.RibbonPanel.WndProc(Message& m) in D:\Volume 1, 2020\Support sources\Tools.Windows\tools-windows\Windows\Tools.Windows\Src\Controls\RibbonPanel\RibbonPanel.cs:line 994
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at RibbonCloseProblem.Program.Main() in D:\Volume 1, 2020\Support\Feb 5\RibbonCloseProblem_60afe69f\RibbonCloseProblem\RibbonCloseProblem\Program.cs:line 18