Sets or returns the date on which the current presentation was last saved. This value is not set by default, is not displayed in the presentation's Properties sheet, and cannot be used to search for a file.

public System.DateTime LastSavedDate{ get; set; }
Public Property LastSavedDate() As Date
          //--- Get LastSavedDate
          DateTime savedDate = docProps.LastSavedDate;

          //--- Set LastSavedDate
          docProps.LastSavedDate = new DateTime(2005, 08, 04);
          '--- Get LastSavedDate
          Dim savedDate As DateTime = docProps.LastSavedDate

          '--- Set LastSavedDate
          docProps.LastSavedDate = New DateTime(2005, 08, 04)