The class is used as a base class for the arguments for any pre-event.

Namespace: Autodesk.Revit.DB.Events
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)

Syntax

C#
`public class PreEventArgs : RevitEventArgs`

Visual Basic
`Public Class PreEventArgs _ Inherits RevitEventArgs`

Visual C++
`public ref class PreEventArgs : public RevitEventArgs`

Inheritance Hierarchy

SystemObject
  SystemEventArgs
    Autodesk.Revit.DB.EventsRevitEventArgs
      Autodesk.Revit.DB.EventsPreEventArgs
        Autodesk.Revit.DB.EventsPreDocEventArgs