diff --git a/csharp/Platform.Data.Doublets.Tests/ResizableDirectMemoryLinksTests.cs b/csharp/Platform.Data.Doublets.Tests/ResizableDirectMemoryLinksTests.cs
index eadbe02b9..eddf2c8f9 100644
--- a/csharp/Platform.Data.Doublets.Tests/ResizableDirectMemoryLinksTests.cs
+++ b/csharp/Platform.Data.Doublets.Tests/ResizableDirectMemoryLinksTests.cs
@@ -8,7 +8,7 @@ namespace Platform.Data.Doublets.Tests
 {
     public static class ResizableDirectMemoryLinksTests
     {
-        private static readonly LinksConstants<ulong> _constants = Default<LinksConstants<ulong>>.Instance;
+        private static readonly LinksConstants<ulong> _constants = new LinksConstants<ulong>(enableExternalReferencesSupport: true);
 
         [Fact]
         public static void BasicFileMappedMemoryTest()
diff --git a/csharp/Platform.Data.Doublets/Link.cs b/csharp/Platform.Data.Doublets/Link.cs
index b09927904..656680f26 100644
--- a/csharp/Platform.Data.Doublets/Link.cs
+++ b/csharp/Platform.Data.Doublets/Link.cs
@@ -24,7 +24,7 @@ public struct Link<TLinkAddress> : IEquatable<Link<TLinkAddress>>, IReadOnlyList
         /// <para></para>
         /// </summary>
         public static readonly Link<TLinkAddress> Null = new Link<TLinkAddress>();
-        private static readonly LinksConstants<TLinkAddress> _constants = Default<LinksConstants<TLinkAddress>>.Instance;
+        private static readonly LinksConstants<TLinkAddress> _constants = new LinksConstants<TLinkAddress>(enableExternalReferencesSupport: true);
         private const int Length = 3;
 
         /// <summary>
diff --git a/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinks.cs b/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinks.cs
index 89636c108..0aab37f6c 100644
--- a/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinks.cs
+++ b/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinks.cs
@@ -79,7 +79,7 @@ public SplitMemoryLinks(IResizableDirectMemory dataMemory, IResizableDirectMemor
     ///     <para></para>
     /// </param>
     [MethodImpl(methodImplOptions: MethodImplOptions.AggressiveInlining)]
-    public SplitMemoryLinks(IResizableDirectMemory dataMemory, IResizableDirectMemory indexMemory, long memoryReservationStep) : this(dataMemory: dataMemory, indexMemory: indexMemory, memoryReservationStep: memoryReservationStep, constants: Default<LinksConstants<TLinkAddress>>.Instance, indexTreeType: IndexTreeType.Default, useLinkedList: true) { }
+    public SplitMemoryLinks(IResizableDirectMemory dataMemory, IResizableDirectMemory indexMemory, long memoryReservationStep) : this(dataMemory: dataMemory, indexMemory: indexMemory, memoryReservationStep: memoryReservationStep, constants: new LinksConstants<TLinkAddress>(enableExternalReferencesSupport: true), indexTreeType: IndexTreeType.Default, useLinkedList: true) { }
 
     /// <summary>
     ///     <para>
diff --git a/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinksBase.cs b/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinksBase.cs
index 9ab5ade78..55adf23c0 100644
--- a/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinksBase.cs
+++ b/csharp/Platform.Data.Doublets/Memory/Split/Generic/SplitMemoryLinksBase.cs
@@ -194,7 +194,7 @@ protected SplitMemoryLinksBase(IResizableDirectMemory dataMemory, IResizableDire
     ///     <para></para>
     /// </param>
     [MethodImpl(methodImplOptions: MethodImplOptions.AggressiveInlining)]
-    protected SplitMemoryLinksBase(IResizableDirectMemory dataMemory, IResizableDirectMemory indexMemory, long memoryReservationStep) : this(dataMemory: dataMemory, indexMemory: indexMemory, memoryReservationStep: memoryReservationStep, constants: Default<LinksConstants<TLinkAddress>>.Instance, useLinkedList: true) { }
+    protected SplitMemoryLinksBase(IResizableDirectMemory dataMemory, IResizableDirectMemory indexMemory, long memoryReservationStep) : this(dataMemory: dataMemory, indexMemory: indexMemory, memoryReservationStep: memoryReservationStep, constants: new LinksConstants<TLinkAddress>(enableExternalReferencesSupport: true), useLinkedList: true) { }
 
     /// <summary>
     ///     Возвращает общее число связей находящихся в хранилище.
diff --git a/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinks.cs b/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinks.cs
index 8eadaf8b0..7349c3cea 100644
--- a/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinks.cs
+++ b/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinks.cs
@@ -72,7 +72,7 @@ public UnitedMemoryLinks(IResizableDirectMemory memory) : this(memory, DefaultLi
         /// <para></para>
         /// </param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public UnitedMemoryLinks(IResizableDirectMemory memory, long memoryReservationStep) : this(memory, memoryReservationStep, Default<LinksConstants<TLinkAddress>>.Instance, IndexTreeType.Default) { }
+        public UnitedMemoryLinks(IResizableDirectMemory memory, long memoryReservationStep) : this(memory, memoryReservationStep, new LinksConstants<TLinkAddress>(enableExternalReferencesSupport: true), IndexTreeType.Default) { }
 
         /// <summary>
         /// <para>
diff --git a/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinksBase.cs b/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinksBase.cs
index ecaa89d37..88c80278f 100644
--- a/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinksBase.cs
+++ b/csharp/Platform.Data.Doublets/Memory/United/Generic/UnitedMemoryLinksBase.cs
@@ -155,7 +155,7 @@ protected UnitedMemoryLinksBase(IResizableDirectMemory memory, long memoryReserv
         /// <para></para>
         /// </param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        protected UnitedMemoryLinksBase(IResizableDirectMemory memory, long memoryReservationStep) : this(memory, memoryReservationStep, Default<LinksConstants<TLinkAddress>>.Instance) { }
+        protected UnitedMemoryLinksBase(IResizableDirectMemory memory, long memoryReservationStep) : this(memory, memoryReservationStep, new LinksConstants<TLinkAddress>(enableExternalReferencesSupport: true)) { }
 
         /// <summary>
         /// <para>