diff --git a/src/Avalonia.Base/Data/Core/AvaloniaPropertyAccessorNode.cs b/src/Avalonia.Base/Data/Core/AvaloniaPropertyAccessorNode.cs
index 536c14dcf9..92fc843394 100644
--- a/src/Avalonia.Base/Data/Core/AvaloniaPropertyAccessorNode.cs
+++ b/src/Avalonia.Base/Data/Core/AvaloniaPropertyAccessorNode.cs
@@ -3,7 +3,7 @@ using Avalonia.Reactive;
 
 namespace Avalonia.Data.Core
 {
-    public class AvaloniaPropertyAccessorNode : SettableNode
+    internal class AvaloniaPropertyAccessorNode : SettableNode
     {
         private IDisposable? _subscription;
         private readonly bool _enableValidation;
diff --git a/src/Avalonia.Base/Data/Core/EmptyExpressionNode.cs b/src/Avalonia.Base/Data/Core/EmptyExpressionNode.cs
index 4e142fbee9..b333fa9047 100644
--- a/src/Avalonia.Base/Data/Core/EmptyExpressionNode.cs
+++ b/src/Avalonia.Base/Data/Core/EmptyExpressionNode.cs
@@ -1,6 +1,6 @@
 namespace Avalonia.Data.Core
 {
-    public class EmptyExpressionNode : ExpressionNode
+    internal class EmptyExpressionNode : ExpressionNode
     {
         public override string Description => ".";
     }
diff --git a/src/Avalonia.Base/Data/Core/ExpressionNode.cs b/src/Avalonia.Base/Data/Core/ExpressionNode.cs
index 5fb2bb5c13..30fc71cfb4 100644
--- a/src/Avalonia.Base/Data/Core/ExpressionNode.cs
+++ b/src/Avalonia.Base/Data/Core/ExpressionNode.cs
@@ -2,7 +2,7 @@ using System;
 
 namespace Avalonia.Data.Core
 {
-    public abstract class ExpressionNode
+    internal abstract class ExpressionNode
     {
         protected static readonly WeakReference<object?> UnsetReference = 
             new WeakReference<object?>(AvaloniaProperty.UnsetValue);
diff --git a/src/Avalonia.Base/Data/Core/IndexerNodeBase.cs b/src/Avalonia.Base/Data/Core/IndexerNodeBase.cs
index 2fad96701d..9ec256225b 100644
--- a/src/Avalonia.Base/Data/Core/IndexerNodeBase.cs
+++ b/src/Avalonia.Base/Data/Core/IndexerNodeBase.cs
@@ -7,7 +7,7 @@ using Avalonia.Utilities;
 
 namespace Avalonia.Data.Core
 {
-    public abstract class IndexerNodeBase : SettableNode,
+    internal abstract class IndexerNodeBase : SettableNode,
         IWeakEventSubscriber<NotifyCollectionChangedEventArgs>,
         IWeakEventSubscriber<PropertyChangedEventArgs>
     {
diff --git a/src/Avalonia.Base/Data/Core/LogicalNotNode.cs b/src/Avalonia.Base/Data/Core/LogicalNotNode.cs
index 45837db73d..81b07bfe85 100644
--- a/src/Avalonia.Base/Data/Core/LogicalNotNode.cs
+++ b/src/Avalonia.Base/Data/Core/LogicalNotNode.cs
@@ -3,7 +3,7 @@ using System.Globalization;
 
 namespace Avalonia.Data.Core
 {
-    public class LogicalNotNode : ExpressionNode, ITransformNode
+    internal class LogicalNotNode : ExpressionNode, ITransformNode
     {
         public override string Description => "!";
 
diff --git a/src/Avalonia.Base/Data/Core/PropertyAccessorNode.cs b/src/Avalonia.Base/Data/Core/PropertyAccessorNode.cs
index 1b79fed6e7..3898d232ec 100644
--- a/src/Avalonia.Base/Data/Core/PropertyAccessorNode.cs
+++ b/src/Avalonia.Base/Data/Core/PropertyAccessorNode.cs
@@ -5,7 +5,7 @@ using Avalonia.Data.Core.Plugins;
 namespace Avalonia.Data.Core
 {
     [RequiresUnreferencedCode(TrimmingMessages.ExpressionNodeRequiresUnreferencedCodeMessage)]
-    public class PropertyAccessorNode : SettableNode
+    internal class PropertyAccessorNode : SettableNode
     {
         private readonly bool _enableValidation;
         private IPropertyAccessorPlugin? _customPlugin;
diff --git a/src/Avalonia.Base/Data/Core/SettableNode.cs b/src/Avalonia.Base/Data/Core/SettableNode.cs
index 9ad9ace814..4980e4487a 100644
--- a/src/Avalonia.Base/Data/Core/SettableNode.cs
+++ b/src/Avalonia.Base/Data/Core/SettableNode.cs
@@ -2,7 +2,7 @@
 
 namespace Avalonia.Data.Core
 {
-    public abstract class SettableNode : ExpressionNode
+    internal abstract class SettableNode : ExpressionNode
     {
         public bool SetTargetValue(object? value, BindingPriority priority)
         {
diff --git a/src/Avalonia.Base/Data/Core/StreamNode.cs b/src/Avalonia.Base/Data/Core/StreamNode.cs
index ba18a2173b..d3da6414ac 100644
--- a/src/Avalonia.Base/Data/Core/StreamNode.cs
+++ b/src/Avalonia.Base/Data/Core/StreamNode.cs
@@ -6,7 +6,7 @@ using Avalonia.Reactive;
 namespace Avalonia.Data.Core
 {
     [RequiresUnreferencedCode(TrimmingMessages.ExpressionNodeRequiresUnreferencedCodeMessage)]
-    public class StreamNode : ExpressionNode
+    internal class StreamNode : ExpressionNode
     {
         private IStreamPlugin? _customPlugin = null;
         private IDisposable? _subscription;
diff --git a/src/Avalonia.Base/Data/Core/TypeCastNode.cs b/src/Avalonia.Base/Data/Core/TypeCastNode.cs
index 3a2ca955fa..655bfbc7a1 100644
--- a/src/Avalonia.Base/Data/Core/TypeCastNode.cs
+++ b/src/Avalonia.Base/Data/Core/TypeCastNode.cs
@@ -4,7 +4,7 @@ using System.Text;
 
 namespace Avalonia.Data.Core
 {
-    public class TypeCastNode : ExpressionNode
+    internal class TypeCastNode : ExpressionNode
     {
         public override string Description => $"as {TargetType.FullName}";
 
diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/CompiledBindingPath.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/CompiledBindingPath.cs
index b7f2261324..2b62d33349 100644
--- a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/CompiledBindingPath.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/CompiledBindingPath.cs
@@ -24,7 +24,7 @@ namespace Avalonia.Markup.Xaml.MarkupExtensions.CompiledBindings
         }
 
         [UnconditionalSuppressMessage("Trimming", "IL2026", Justification = TrimmingMessages.CompiledBindingSafeSupressWarningMessage)]
-        public ExpressionNode BuildExpression(bool enableValidation)
+        internal ExpressionNode BuildExpression(bool enableValidation)
         {
             ExpressionNode pathRoot = null;
             ExpressionNode path = null;
diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/StrongTypeCastNode.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/StrongTypeCastNode.cs
index 1252ec7eca..b543fd9c01 100644
--- a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/StrongTypeCastNode.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindings/StrongTypeCastNode.cs
@@ -3,7 +3,7 @@ using Avalonia.Data.Core;
 
 namespace Avalonia.Markup.Xaml.MarkupExtensions.CompiledBindings
 {
-    public class StrongTypeCastNode : TypeCastNode
+    internal class StrongTypeCastNode : TypeCastNode
     {
         private Func<object, object> _cast;
 
diff --git a/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/ElementNameNode.cs b/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/ElementNameNode.cs
index 4fc17e440b..e676c74879 100644
--- a/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/ElementNameNode.cs
+++ b/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/ElementNameNode.cs
@@ -6,7 +6,7 @@ using Avalonia.Reactive;
 
 namespace Avalonia.Markup.Parsers.Nodes
 {
-    public class ElementNameNode : ExpressionNode
+    internal class ElementNameNode : ExpressionNode
     {
         private readonly WeakReference<INameScope> _nameScope;
         private readonly string _name;
diff --git a/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/FindAncestorNode.cs b/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/FindAncestorNode.cs
index ffbd34d492..383a160814 100644
--- a/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/FindAncestorNode.cs
+++ b/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/FindAncestorNode.cs
@@ -5,7 +5,7 @@ using Avalonia.Reactive;
 
 namespace Avalonia.Markup.Parsers.Nodes
 {
-    public class FindAncestorNode : ExpressionNode
+    internal class FindAncestorNode : ExpressionNode
     {
         private readonly int _level;
         private readonly Type? _ancestorType;
diff --git a/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/SelfNode.cs b/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/SelfNode.cs
index 1cd233c68a..2cb87efa65 100644
--- a/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/SelfNode.cs
+++ b/src/Markup/Avalonia.Markup/Markup/Parsers/Nodes/SelfNode.cs
@@ -2,7 +2,7 @@
 
 namespace Avalonia.Markup.Parsers.Nodes
 {
-    public class SelfNode : ExpressionNode
+    internal class SelfNode : ExpressionNode
     {
         public override string Description => "$self";
     }