public static void SetAttribute(this StageElement parent, string name, object value) { bool flag = value == null; StageAttribute str = parent.Attribute(name); if (str != null) { if (flag) { str.Remove(); return; } if (str.isText && !(value is string)) { throw new InvalidOperationException("Use SetTextAttribute to set text attributes."); } str.@value = SerializationMaster.ToString(value); } else if (!flag) { parent.Add(SerializationMaster.ToStageAttribute(name, value)); return; } }