public enum AnnotationFollowMode : System.Enum, System.IComparable, System.IConvertible, System.IFormattable  

var eOptions = ApplicationOptions.EditingOptions;

var followLinkedLines = eOptions.AutomaticallyFollowLinkedLineFeatures;
var followLinedPolygons = eOptions.AutomaticallyFollowLinkedPolygonFeatures;
var usePlacementProps = eOptions.UseAnnotationPlacementProperties;
var followMode = eOptions.AnnotationFollowMode;
var placementMode = eOptions.AnnotationPlacementMode;

     
eOptions.AnnotationFollowMode = AnnotationFollowMode.Parallel;
eOptions.AnnotationPlacementMode = AnnotationPlacementMode.Left;