Partial Type
System/Windows/Forms/Controls/UpDown/UpDownBase.UpDownButtons.cs
System/Windows/Forms/Controls/UpDown/UpDownBase.UpDownButtons.UpDownButtonsAccessibleObject.cs
System/Windows/Forms/Controls/UpDown/UpDownBase.UpDownButtons.UpDownButtonsAccessibleObject.DirectionButtonAccessibleObject.cs