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ExternalServiceOptions.IsRecordable

Property
Description:
Indicates whether executions of the service is recorded in documents or not.
Remarks:

When a recordable service is executed in a document, a record about the executed server (or servers) is stored in the document's history. This allows active servers to be synchronized next time a saved document is opened in Revit.

Executions of a recordable service in a document must happen inside a transaction.

Syntax
public bool IsRecordable { get; set; }
Exceptions
Exception Condition
ArgumentException When setting this property: A service that doens't support activation should not be recordable.