Cannet QAT serialize/deserialize MyCommand

Hi,

I want to QAT Serialize button with MyCommand that inherited System.Windows.Input.ICommand.
However, the following error occurs and can not be serialized.

Cannot serialize a nested public type 'MyApplication.CommandManager+OperatingCommandExecuter'.

Could you tell us the requirements of the command to QAT serialize?

For your reference, I show you StackTrace

 System.Windows.Markup.Primitives.MarkupWriter.VerifyTypeIsSerializable(Type type)
 System.Windows.Markup.Primitives.MarkupWriter.WriteItem(MarkupObject item, Scope scope)
 System.Windows.Markup.Primitives.MarkupWriter.WriteItem(MarkupObject item, Scope scope)
 System.Windows.Markup.Primitives.MarkupWriter.WriteItem(MarkupObject item, Scope scope)
 System.Windows.Markup.Primitives.MarkupWriter.WriteItem(MarkupObject item, Scope scope)
 System.Windows.Markup.Primitives.MarkupWriter.WriteItem(MarkupObject item, Scope scope)
 System.Windows.Markup.Primitives.MarkupWriter.WriteItem(MarkupObject item)
 System.Windows.Markup.Primitives.MarkupWriter.SaveAsXml(XmlWriter writer, MarkupObject item)
 System.Windows.Markup.Primitives.MarkupWriter.SaveAsXml(XmlWriter writer, Object instance)
 System.Windows.Markup.XamlWriter.Save(Object obj, XmlWriter xmlWriter
 ActiproSoftware.Windows.Serialization.XamlSerializer.SaveToXmlWriter(XmlWriter writer, Object value)
 ActiproSoftware.Windows.Serialization.XamlSerializer.SaveToString(Object value)
 ActiproSoftware.Windows.Controls.Ribbon.Customization.RibbonControlPathList.#ztb()
 ActiproSoftware.Windows.Controls.Ribbon.Ribbon.SerializeQuickAccessToolBarItems()