Sets the value of the specified property.

 public void SetDocumentProperty(BuiltInProperty property, System.Object propertyValue)

Public Sub SetDocumentProperty(ByVal [property] As BuiltInProperty, ByVal propertyValue As Object)

A DocumentProperties.BuiltInProperty object that represents the built-in property to set.

An Object that represents the value of the property specified.

SetDocumentProperty will throw this exception if an invalid type is passed for the property.

CreationDate, EditTime and LastPrintedDate must be of type System.DateTime.
RevisionNumber must be of type int.
ScaleOrCrop and LinksUpToDate must be of type Boolean

This feature is available in OOXML files (DOCX/DOCM) only.

Setting the value to null will clear any existing values.

This is the MS Word equivalent of File menu > Info > Show All Properties:

//--- Set "Author" Property
WordTemplate wt = new WordTemplate();
wt.Open(@"c:\templates\Template.doc");
wt.SetDocumentProperty(DocumentProperties.BuiltInProperty.Author, "Jennifer WordSmith");
wt.Process();
wt.Save(@"c:\reports\Report.doc");
        

//--- Set "Author" Property
Dim wt As New WordTemplate()
wt.Open("c:\templates\Template.doc")
wt.SetDataSource(DocumentProperties.BuiltInProperty.Author, "Jennifer WordSmith")
wt.Process()
wt.Save("c:\reports\Report.doc")