Starting in .NET 8, the affected methods throw a NotSupportedException at run time across all project types except Windows Forms and WPF. The APIs continue to remain obsolete (as error) across all project types, including Windows Forms and WPF.
Functions like: CreateRestorePoint SaveAsBinary LoadFromBinary uses BinaryFormatter and in .net8-windows i get SerializationException from System.CoreLib
Inner Exception : Source :System.Private.CoreLib Message :Serializing delegates is not supported on this platform. Type :System.Runtime.Serialization.SerializationException Stack trace : at System.MulticastDelegate.GetObjectData(SerializationInfo info, StreamingContext context) at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder) at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Write(WriteObjectInfo objectInfo, NameInfo memberNameInfo, NameInfo typeNameInfo) at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, BinaryFormatterWriter serWriter) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph) at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.SaveHelper(Stream stream, IFormatter formatter)
Breaking change: BinaryFormatter disabled across most project types - .NET | Microsoft Learn
learn.microsoft.com/.../system.runtime.serialization.serializationexception
Now it's happening on WinForms. Any resolution? This can hardly be a surprise, it's been warning for a long time.
Hello and thank you for contacting Infragistics. Please attach a sample project isolating the behavior. Are you using our Windows Forms UltraToolbarsManager in an ASP.NET project? If so and the issue doesn't happen in in WinForms this would be considered not a supported environment.