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DefaultValueException

Class
Description:
The exception thrown when Revit cannot initialize a default value for a family parameter.
Inheritance Hierarchy:
System.Object
  System.Exception
    Autodesk.Revit.Exceptions.ApplicationException
      Autodesk.Revit.Exceptions.InvalidOperationException
        Autodesk.Revit.Exceptions.DefaultValueException
Syntax
[SerializableAttribute]
public class DefaultValueException : InvalidOperationException