ExtensionDataGetter public sealed delegate ExtensionDataGetter : MulticastDelegate Gets extension data for an object during serialization. Documentation Code public ExtensionDataGetter(object object, IntPtr method) public virtual IAsyncResult BeginInvoke(object o, AsyncCallback callback, object object) public virtual IEnumerable<KeyValuePair<object, object>> EndInvoke(IAsyncResult result) public virtual IEnumerable<KeyValuePair<object, object>> Invoke(object o)