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Namespace: Autodesk.Revit.DB Class: Family

Family.FamilyCategoryId

Property
Description:
The id of the category or sub category in which the elements that this family could generate reside.
Syntax
public ElementId FamilyCategoryId { get; set; }
Exceptions
Exception Condition
ArgumentException When setting this property: The input category id cannot be assigned as the new category for this family.
ArgumentNullException When setting this property: A non-optional argument was null
InvalidOperationException When setting this property: The family is not an owner family for its own editable document.