WordTemplate.Open

Overload	Description
Open(String)	Opens the WordWriter template specified by the `templateFileName` parameter.
Open(System.IO.Stream)	Opens a WordWriter template from a `System.IO.Stream`. A WordWriter template is a file created in Microsoft Word that contains merge fields.
Open(WordApplication, Document)	Passes a document from WordApplication to WordTemplate.

Overload	Description
Open(Microsoft.SharePoint.SPDocumentLibrary, String)	Opens the WordWriter template specified by the `templateFileName` parameter.
Open(Microsoft.SharePoint.SPListItem, String)	Opens the WordWriter template specified by the `templateFileName` parameter.