castleproject · snakefoot · May 21, 2026
diff --git a/README.md b/README.md
@@ -55,11 +55,9 @@ Symbol                              | .NET 4.6.2         | .NET Standard 2.0 | .
 `FEATURE_APPDOMAIN`                 | :white_check_mark: | :no_entry_sign:   | :no_entry_sign:    | :no_entry_sign:
 `FEATURE_ASSEMBLYBUILDER_SAVE`      | :white_check_mark: | :no_entry_sign:   | :no_entry_sign:    | :no_entry_sign:
 `FEATURE_BYREFLIKE`                 | :no_entry_sign:    | :no_entry_sign:   | :white_check_mark: | :white_check_mark:
-`FEATURE_SERIALIZATION`             | :white_check_mark: | :no_entry_sign:   | :no_entry_sign:    | :no_entry_sign:
 `FEATURE_SYSTEM_CONFIGURATION`      | :white_check_mark: | :no_entry_sign:   | :no_entry_sign:    | :no_entry_sign:
 
 * `FEATURE_APPDOMAIN` - enables support for features that make use of an AppDomain in the host.
 * `FEATURE_ASSEMBLYBUILDER_SAVE` - enabled support for saving the dynamically generated proxy assembly.
 * `FEATURE_BYREFLIKE` - enables support for by-ref-like (`ref struct`) types such as `Span<T>` and `ReadOnlySpan<T>`.
-* `FEATURE_SERIALIZATION` - enables support for serialization of dynamic proxies and other types.
 * `FEATURE_SYSTEM_CONFIGURATION` - enables features that use System.Configuration and the ConfigurationManager.
diff --git a/buildscripts/common.props b/buildscripts/common.props
@@ -56,7 +56,7 @@
 		<DiagnosticsConstants>DEBUG</DiagnosticsConstants>
 		<NetStandard20Constants>TRACE</NetStandard20Constants>
 		<NetStandard21Constants>TRACE</NetStandard21Constants>
-		<DesktopClrConstants>TRACE;FEATURE_APPDOMAIN;FEATURE_ASSEMBLYBUILDER_SAVE;FEATURE_SERIALIZATION;FEATURE_SYSTEM_CONFIGURATION</DesktopClrConstants>
+		<DesktopClrConstants>TRACE;FEATURE_APPDOMAIN;FEATURE_ASSEMBLYBUILDER_SAVE;FEATURE_SYSTEM_CONFIGURATION</DesktopClrConstants>
 	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(TargetFramework)|$(Configuration)'=='net462|Debug'">

diff --git a/ref/Castle.Core-net462.cs b/ref/Castle.Core-net462.cs
@@ -1811,7 +1811,6 @@ public static void SetXsiType(this Castle.Components.DictionaryAdapter.Xml.IXmlN
 }
 namespace Castle.Core.Configuration
 {
-    [System.Serializable]
     public abstract class AbstractConfiguration : Castle.Core.Configuration.IConfiguration
     {
         protected AbstractConfiguration() { }
@@ -1821,13 +1820,10 @@ protected AbstractConfiguration() { }
         public string Value { get; protected set; }
         public virtual object GetValue(System.Type type, object defaultValue) { }
     }
-    [System.Serializable]
     public class ConfigurationAttributeCollection : System.Collections.Specialized.NameValueCollection
     {
         public ConfigurationAttributeCollection() { }
-        protected ConfigurationAttributeCollection(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
     }
-    [System.Serializable]
     public class ConfigurationCollection : System.Collections.Generic.List<Castle.Core.Configuration.IConfiguration>
     {
         public ConfigurationCollection() { }
@@ -1842,7 +1838,6 @@ public interface IConfiguration
         string Value { get; }
         object GetValue(System.Type type, object defaultValue);
     }
-    [System.Serializable]
     public class MutableConfiguration : Castle.Core.Configuration.AbstractConfiguration
     {
         public MutableConfiguration(string name) { }
@@ -1884,7 +1879,6 @@ public static class ProxyServices
     {
         public static bool IsDynamicProxy(System.Type type) { }
     }
-    [System.Serializable]
     public class ReferenceEqualityComparer<T> : System.Collections.Generic.IEqualityComparer<T>, System.Collections.IEqualityComparer
     {
         public static Castle.Core.ReferenceEqualityComparer<T> Instance { get; }
@@ -1963,7 +1957,6 @@ public virtual Castle.Core.Logging.IExtendedLogger Create(System.Type type, Cast
         public abstract Castle.Core.Logging.IExtendedLogger Create(string name, Castle.Core.Logging.LoggerLevel level);
         protected static System.IO.FileInfo GetConfigFile(string fileName) { }
     }
-    [System.Serializable]
     public abstract class AbstractLoggerFactory : Castle.Core.Logging.ILoggerFactory
     {
         protected AbstractLoggerFactory() { }
@@ -1973,7 +1966,6 @@ public virtual Castle.Core.Logging.ILogger Create(System.Type type, Castle.Core.
         public abstract Castle.Core.Logging.ILogger Create(string name, Castle.Core.Logging.LoggerLevel level);
         protected static System.IO.FileInfo GetConfigFile(string fileName) { }
     }
-    [System.Serializable]
     public class ConsoleFactory : Castle.Core.Logging.ILoggerFactory
     {
         public ConsoleFactory() { }
@@ -1983,7 +1975,6 @@ public Castle.Core.Logging.ILogger Create(string name) { }
         public Castle.Core.Logging.ILogger Create(System.Type type, Castle.Core.Logging.LoggerLevel level) { }
         public Castle.Core.Logging.ILogger Create(string name, Castle.Core.Logging.LoggerLevel level) { }
     }
-    [System.Serializable]
     public class ConsoleLogger : Castle.Core.Logging.LevelFilteredLogger
     {
         public ConsoleLogger() { }
@@ -2080,7 +2071,6 @@ public interface ILoggerFactory
         Castle.Core.Logging.ILogger Create(System.Type type, Castle.Core.Logging.LoggerLevel level);
         Castle.Core.Logging.ILogger Create(string name, Castle.Core.Logging.LoggerLevel level);
     }
-    [System.Serializable]
     public abstract class LevelFilteredLogger : Castle.Core.Logging.ILogger
     {
         protected LevelFilteredLogger() { }
@@ -2141,12 +2131,10 @@ public void WarnFormat(System.Exception exception, string format, params object[
         public void WarnFormat(System.IFormatProvider formatProvider, string format, params object[] args) { }
         public void WarnFormat(System.Exception exception, System.IFormatProvider formatProvider, string format, params object[] args) { }
     }
-    [System.Serializable]
     public class LoggerException : System.Exception
     {
         public LoggerException() { }
         public LoggerException(string message) { }
-        protected LoggerException(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
         public LoggerException(string message, System.Exception innerException) { }
     }
     public enum LoggerLevel
@@ -2159,7 +2147,6 @@ public enum LoggerLevel
         Debug = 5,
         Trace = 6,
     }
-    [System.Serializable]
     public class NullLogFactory : Castle.Core.Logging.AbstractLoggerFactory
     {
         public NullLogFactory() { }
@@ -2223,7 +2210,6 @@ public void WarnFormat(System.Exception exception, string format, params object[
         public void WarnFormat(System.IFormatProvider formatProvider, string format, params object[] args) { }
         public void WarnFormat(System.Exception exception, System.IFormatProvider formatProvider, string format, params object[] args) { }
     }
-    [System.Serializable]
     public class StreamLogger : Castle.Core.Logging.LevelFilteredLogger, System.IDisposable
     {
         public StreamLogger(string name, System.IO.Stream stream) { }
@@ -2236,7 +2222,6 @@ protected virtual void Dispose(bool disposing) { }
         protected override void Finalize() { }
         protected override void Log(Castle.Core.Logging.LoggerLevel loggerLevel, string loggerName, string message, System.Exception exception) { }
     }
-    [System.Serializable]
     public class StreamLoggerFactory : Castle.Core.Logging.AbstractLoggerFactory
     {
         public StreamLoggerFactory() { }
@@ -2318,7 +2303,6 @@ public bool Accept(Castle.Core.Resource.CustomUri uri) { }
         public Castle.Core.Resource.IResource Create(Castle.Core.Resource.CustomUri uri) { }
         public Castle.Core.Resource.IResource Create(Castle.Core.Resource.CustomUri uri, string basePath) { }
     }
-    [System.Serializable]
     public sealed class CustomUri
     {
         public static readonly string SchemeDelimiter;
@@ -2362,12 +2346,10 @@ public interface IResourceFactory
         Castle.Core.Resource.IResource Create(Castle.Core.Resource.CustomUri uri);
         Castle.Core.Resource.IResource Create(Castle.Core.Resource.CustomUri uri, string basePath);
     }
-    [System.Serializable]
     public class ResourceException : System.Exception
     {
         public ResourceException() { }
         public ResourceException(string message) { }
-        protected ResourceException(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
         public ResourceException(string message, System.Exception innerException) { }
     }
     public class StaticContentResource : Castle.Core.Resource.AbstractResource
@@ -2447,7 +2429,6 @@ public void SetGenericMethodArguments(System.Type[] arguments) { }
         [System.Diagnostics.CodeAnalysis.DoesNotReturn]
         protected void ThrowOnNoTarget() { }
     }
-    [System.Serializable]
     public class AllMethodsHook : Castle.DynamicProxy.IProxyGenerationHook
     {
         protected static readonly System.Collections.Generic.ICollection<System.Type> SkippedTypes;
@@ -2481,7 +2462,6 @@ public System.Type CreateInterfaceProxyTypeWithTarget(System.Type interfaceToPro
         public System.Type CreateInterfaceProxyTypeWithTargetInterface(System.Type interfaceToProxy, System.Type[]? additionalInterfacesToProxy, Castle.DynamicProxy.ProxyGenerationOptions options) { }
         public System.Type CreateInterfaceProxyTypeWithoutTarget(System.Type interfaceToProxy, System.Type[]? additionalInterfacesToProxy, Castle.DynamicProxy.ProxyGenerationOptions options) { }
     }
-    [System.Serializable]
     public sealed class DynamicProxyException : System.Exception { }
     public interface IChangeProxyTarget
     {
@@ -2622,7 +2602,6 @@ public ModuleScope(bool savePhysicalAssembly, bool disableSignedModule, string s
         public string StrongNamedModuleName { get; }
         public string? WeakNamedModuleDirectory { get; }
         public string WeakNamedModuleName { get; }
-        public void LoadAssemblyIntoCache(System.Reflection.Assembly assembly) { }
         public string? SaveAssembly() { }
         public string? SaveAssembly(bool strongNamed) { }
         public static byte[] GetKeyPair() { }
@@ -2632,8 +2611,7 @@ public class PersistentProxyBuilder : Castle.DynamicProxy.DefaultProxyBuilder
         public PersistentProxyBuilder() { }
         public string? SaveAssembly() { }
     }
-    [System.Serializable]
-    public class ProxyGenerationOptions : System.Runtime.Serialization.ISerializable
+    public class ProxyGenerationOptions
     {
         public static readonly Castle.DynamicProxy.ProxyGenerationOptions Default;
         public ProxyGenerationOptions() { }
@@ -2649,7 +2627,6 @@ public void AddDelegateTypeMixin(System.Type delegateType) { }
         public void AddMixinInstance(object instance) { }
         public override bool Equals(object? obj) { }
         public override int GetHashCode() { }
-        public void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
         public void Initialize() { }
         public object[] MixinsAsArray() { }
     }
@@ -2738,7 +2715,6 @@ public static bool IsAccessible(System.Reflection.MethodBase method, [System.Dia
         public static bool IsProxy(object? instance) { }
         public static bool IsProxyType(System.Type type) { }
     }
-    [System.Serializable]
     public class StandardInterceptor : Castle.DynamicProxy.IInterceptor
     {
         public StandardInterceptor() { }
@@ -2783,13 +2759,11 @@ protected InheritanceInvocation(System.Type targetType, object proxy, Castle.Dyn
         public override System.Type TargetType { get; }
         protected abstract override void InvokeMethodOnTarget() { }
     }
-    [System.Serializable]
     public sealed class InheritanceInvocationWithoutTarget : Castle.DynamicProxy.Internal.InheritanceInvocation
     {
         public InheritanceInvocationWithoutTarget(System.Type targetType, object proxy, Castle.DynamicProxy.IInterceptor[] interceptors, System.Reflection.MethodInfo proxiedMethod, object[] arguments) { }
         protected override void InvokeMethodOnTarget() { }
     }
-    [System.Serializable]
     public sealed class InterfaceMethodWithoutTargetInvocation : Castle.DynamicProxy.AbstractInvocation
     {
         public InterfaceMethodWithoutTargetInvocation(object? target, object proxy, Castle.DynamicProxy.IInterceptor[] interceptors, System.Reflection.MethodInfo proxiedMethod, object?[] arguments) { }
@@ -2804,29 +2778,4 @@ public static System.Type[] GetAllInterfaces(this System.Type type) { }
         public static System.Type? GetTypeOrNull(object? target) { }
         public static System.Reflection.MemberInfo[] Sort(System.Reflection.MemberInfo[] members) { }
     }
-}
-namespace Castle.DynamicProxy.Serialization
-{
-    [System.AttributeUsage(System.AttributeTargets.Assembly, AllowMultiple=false)]
-    [System.CLSCompliant(false)]
-    public class CacheMappingsAttribute : System.Attribute
-    {
-        public CacheMappingsAttribute(byte[] serializedCacheMappings) { }
-        public byte[] SerializedCacheMappings { get; }
-    }
-    [System.Serializable]
-    public class ProxyObjectReference : System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.IObjectReference, System.Runtime.Serialization.ISerializable
-    {
-        protected ProxyObjectReference(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
-        public static Castle.DynamicProxy.ModuleScope ModuleScope { get; }
-        public void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
-        public object GetRealObject(System.Runtime.Serialization.StreamingContext context) { }
-        protected void InvokeCallback(object target) { }
-        public void OnDeserialization(object sender) { }
-        public object RecreateClassProxy() { }
-        public object RecreateInterfaceProxy(string generatorType) { }
-        protected virtual object RecreateProxy() { }
-        public static void ResetScope() { }
-        public static void SetScope(Castle.DynamicProxy.ModuleScope scope) { }
-    }
 }
diff --git a/ref/Castle.Services.Logging.EventLogIntegration-net462.cs b/ref/Castle.Services.Logging.EventLogIntegration-net462.cs
@@ -2,7 +2,6 @@
 [assembly: System.Runtime.Versioning.TargetFramework(".NETFramework,Version=v4.6.2", FrameworkDisplayName=".NET Framework 4.6.2")]
 namespace Castle.Services.Logging.EventLogIntegration
 {
-    [System.Serializable]
     public class DiagnosticsLogger : Castle.Core.Logging.LevelFilteredLogger, System.IDisposable
     {
         public DiagnosticsLogger(string logName) { }
@@ -14,7 +13,6 @@ protected virtual void Dispose(bool disposing) { }
         protected override void Finalize() { }
         protected override void Log(Castle.Core.Logging.LoggerLevel loggerLevel, string loggerName, string message, System.Exception exception) { }
     }
-    [System.Serializable]
     public class DiagnosticsLoggerFactory : Castle.Core.Logging.AbstractLoggerFactory
     {
         public DiagnosticsLoggerFactory() { }

diff --git a/ref/Castle.Services.Logging.SerilogIntegration-net462.cs b/ref/Castle.Services.Logging.SerilogIntegration-net462.cs
@@ -9,7 +9,6 @@ public SerilogFactory(Serilog.ILogger logger) { }
         public override Castle.Core.Logging.ILogger Create(string name) { }
         public override Castle.Core.Logging.ILogger Create(string name, Castle.Core.Logging.LoggerLevel level) { }
     }
-    [System.Serializable]
     public class SerilogLogger : Castle.Core.Logging.ILogger
     {
         public SerilogLogger(Serilog.ILogger logger, Castle.Services.Logging.SerilogIntegration.SerilogFactory factory) { }

diff --git a/ref/Castle.Services.Logging.log4netIntegration-net462.cs b/ref/Castle.Services.Logging.log4netIntegration-net462.cs
@@ -38,7 +38,6 @@ public Log4netFactory(string configFile) { }
         public override Castle.Core.Logging.ILogger Create(string name) { }
         public override Castle.Core.Logging.ILogger Create(string name, Castle.Core.Logging.LoggerLevel level) { }
     }
-    [System.Serializable]
     public class Log4netLogger : Castle.Core.Logging.ILogger
     {
         public Log4netLogger(log4net.Core.ILogger logger, Castle.Services.Logging.Log4netIntegration.Log4netFactory factory) { }

diff --git a/src/Castle.Core.Tests/DynamicProxy.Tests/BugsReported/DynProxy159.cs b/src/Castle.Core.Tests/DynamicProxy.Tests/BugsReported/DynProxy159.cs
diff --git a/src/Castle.Core.Tests/DynamicProxy.Tests/Classes/ClassOverridingEqualsAndGetHashCode.cs b/src/Castle.Core.Tests/DynamicProxy.Tests/Classes/ClassOverridingEqualsAndGetHashCode.cs
@@ -16,9 +16,6 @@ namespace Castle.DynamicProxy.Tests.Classes
 {
 	using System;
 
-#if FEATURE_SERIALIZATION
-	[Serializable]
-#endif
 	public class ClassOverridingEqualsAndGetHashCode
 	{
 		private Guid _id;

diff --git a/src/Castle.Core.Tests/DynamicProxy.Tests/Classes/ClassWithExplicitInterface.cs b/src/Castle.Core.Tests/DynamicProxy.Tests/Classes/ClassWithExplicitInterface.cs
@@ -14,11 +14,6 @@
 
 namespace Castle.DynamicProxy.Tests.Classes
 {
-	using System;
-
-#if FEATURE_SERIALIZATION
-	[Serializable]
-#endif
 	public class ClassWithExplicitInterface : ISimpleInterface
 	{
 		int ISimpleInterface.Do()

diff --git a/src/Castle.Core.Tests/DynamicProxy.Tests/Classes/ClassWithInterface.cs b/src/Castle.Core.Tests/DynamicProxy.Tests/Classes/ClassWithInterface.cs
@@ -14,11 +14,6 @@
 
 namespace Castle.DynamicProxy.Tests.Classes
 {
-	using System;
-
-#if FEATURE_SERIALIZATION
-	[Serializable]
-#endif
 	public class ClassWithInterface : ISimpleInterface
 	{
 		public int Do()