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ColumnAttachment.RemoveColumnAttachment(FamilyInstance, ElementId)

Method
Description:
Removes any attachment of the column to the specified target.
Remarks:
This method modifies both column and target elements.
Syntax
public static void RemoveColumnAttachment(
	FamilyInstance column,
	ElementId targetId
)
Parameters
Parameter Type Description
column FamilyInstance A column.
targetId ElementId Id of a target element.
Return Value
Exceptions
Exception Condition
ArgumentNullException A non-optional argument was null