diff --git a/QuickFIXn/Fields/Fields.cs b/QuickFIXn/Fields/Fields.cs
index 7ab9b1af0..a1f7ee6af 100644
--- a/QuickFIXn/Fields/Fields.cs
+++ b/QuickFIXn/Fields/Fields.cs
@@ -1,8 +1,6 @@
 // This is a generated file.  Don't edit it directly!
 
 using System;
-using SeqNumType = System.UInt64;
-using SeqNumFieldType = QuickFix.Fields.ULongField;
 
 namespace QuickFix.Fields
 {
diff --git a/QuickFIXn/FileStore.cs b/QuickFIXn/FileStore.cs
index c6faf9c11..afb221af7 100755
--- a/QuickFIXn/FileStore.cs
+++ b/QuickFIXn/FileStore.cs
@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Text;
 using QuickFix.Util;
-using SeqNumType = System.UInt64;
 
 namespace QuickFix
 {
diff --git a/QuickFIXn/GlobalUsing.cs b/QuickFIXn/GlobalUsing.cs
new file mode 100644
index 000000000..7747ec155
--- /dev/null
+++ b/QuickFIXn/GlobalUsing.cs
@@ -0,0 +1,2 @@
+global using SeqNumType = System.UInt64;
+global using SeqNumFieldType = QuickFix.Fields.ULongField;
diff --git a/QuickFIXn/HttpServer.cs b/QuickFIXn/HttpServer.cs
index 0b83c151a..66161d173 100644
--- a/QuickFIXn/HttpServer.cs
+++ b/QuickFIXn/HttpServer.cs
@@ -5,7 +5,6 @@
 using System.Threading;
 using System.Web;
 using QuickFix;
-using SeqNumType = System.UInt64;
 
 namespace Acceptor
 {
diff --git a/QuickFIXn/IMessageStore.cs b/QuickFIXn/IMessageStore.cs
index 063d6d86a..a4657ccd9 100755
--- a/QuickFIXn/IMessageStore.cs
+++ b/QuickFIXn/IMessageStore.cs
@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System;
-using SeqNumType = System.UInt64;
 
 namespace QuickFix
 {
diff --git a/QuickFIXn/MemoryStore.cs b/QuickFIXn/MemoryStore.cs
index 2a9e77c4d..a32a25af3 100755
--- a/QuickFIXn/MemoryStore.cs
+++ b/QuickFIXn/MemoryStore.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using SeqNumType = System.UInt64;
 
 namespace QuickFix
 {
diff --git a/QuickFIXn/ResendRange.cs b/QuickFIXn/ResendRange.cs
index 1469ba18c..0ed685e1d 100755
--- a/QuickFIXn/ResendRange.cs
+++ b/QuickFIXn/ResendRange.cs
@@ -1,6 +1,4 @@
-using SeqNumType = System.UInt64;
-
-namespace QuickFix
+namespace QuickFix
 {
     public class ResendRange
     {
diff --git a/QuickFIXn/Session.cs b/QuickFIXn/Session.cs
index 5a709c674..128dae377 100755
--- a/QuickFIXn/Session.cs
+++ b/QuickFIXn/Session.cs
@@ -3,7 +3,6 @@
 using System.Threading;
 using QuickFix.Fields;
 using QuickFix.Fields.Converters;
-using SeqNumType = System.UInt64;
 
 namespace QuickFix
 {
diff --git a/QuickFIXn/SessionState.cs b/QuickFIXn/SessionState.cs
index 50b8e2f72..5563a4ada 100755
--- a/QuickFIXn/SessionState.cs
+++ b/QuickFIXn/SessionState.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using MessagesBySeqNum = System.Collections.Generic.Dictionary<ulong, QuickFix.Message>;
-using SeqNumType = System.UInt64;
 
 namespace QuickFix
 {
diff --git a/UnitTests/GlobalUsing.cs b/UnitTests/GlobalUsing.cs
new file mode 100644
index 000000000..7747ec155
--- /dev/null
+++ b/UnitTests/GlobalUsing.cs
@@ -0,0 +1,2 @@
+global using SeqNumType = System.UInt64;
+global using SeqNumFieldType = QuickFix.Fields.ULongField;
diff --git a/UnitTests/SessionStateTest.cs b/UnitTests/SessionStateTest.cs
index 5b82068f9..d16747b06 100755
--- a/UnitTests/SessionStateTest.cs
+++ b/UnitTests/SessionStateTest.cs
@@ -5,7 +5,6 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Threading;
-using SeqNumType = System.UInt64;
 
 namespace UnitTests
 {
diff --git a/UnitTests/SessionTest.cs b/UnitTests/SessionTest.cs
index 597682d30..ccfa316f4 100755
--- a/UnitTests/SessionTest.cs
+++ b/UnitTests/SessionTest.cs
@@ -4,7 +4,6 @@
 using System.Text.RegularExpressions;
 using NUnit.Framework;
 using System.Threading;
-using SeqNumType = System.UInt64;
 
 namespace UnitTests
 {