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Introduction to Revit 2011 API
DB Element
Element.Parameters
§Parameters property of an Element class largely corresponds to an element or family “properties” in the UI.
§In API, there are two ways to access those properties or parameters: 
§Element.Parameters – returns a set of parameters applicable to the given element.
§Element.Parameter – takes an argument that can identify the kind of parameter and returns the value of single parameter.
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