This attribute lets you mark properties of fields in a class as nonserializable, so that they are ignored during a serialization operation. Typical examples of nonserializable data include pointers, handles, and other data structures that can't be re-created during deserialization. By default, a class is not eligible for serialization unless it implements System.Runtime.Serialization.ISerializable or is marked with a SerializableAttribute . Once a class is marked as serializable, you must mark all fields or properties that are not to be serialized with a NonSerializedAttribute . public sealed class NonSerializedAttribute : Attribute { // Public Constructors public NonSerializedAttribute ( ); } HierarchyObject Attribute NonSerializedAttribute Valid OnField |