diff --git a/Directory.Build.props b/Directory.Build.props
index 7f4a697aff..f606c36a80 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <VersionPrefix>14.0.5</VersionPrefix>
+    <VersionPrefix>14.0.6</VersionPrefix>
 
     <Authors>Rico Suter</Authors>
     <Copyright>Copyright © Rico Suter, 2023</Copyright>
diff --git a/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid b/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid
index 584842c89f..d774f0c82e 100644
--- a/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid
+++ b/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid
@@ -30,7 +30,9 @@
 {%     unless constructorParameters == "" -%}{% assign constructorParameters = constructorParameters | append: ", " -%}{% endunless -%}
 {%     assign constructorParameters = constructorParameters | append: HttpClientType | append: " httpClient" -%}
 {% endif -%}
+#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
     public {{ Class }}({{ constructorParameters }}){% if HasConfigurationClass and HasBaseClass -%}{{ " : base(configuration)"}}{% endif %}
+#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
     {
 {%     if UseBaseUrl -%}
 {%         if HasBaseUrl -%}
@@ -85,7 +87,6 @@
     public string BaseUrl
     {
         get { return _baseUrl; }
-        [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
         set
         {
             _baseUrl = value;
diff --git a/src/NSwag.CodeGeneration.CSharp/Templates/File.Header.liquid b/src/NSwag.CodeGeneration.CSharp/Templates/File.Header.liquid
index 1bb6dcc076..27bf6e6ce1 100644
--- a/src/NSwag.CodeGeneration.CSharp/Templates/File.Header.liquid
+++ b/src/NSwag.CodeGeneration.CSharp/Templates/File.Header.liquid
@@ -8,4 +8,5 @@
 #pragma warning disable 3016 // Disable "CS3016 Arrays as attribute arguments is not CLS-compliant"
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
-#pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
\ No newline at end of file
+#pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
\ No newline at end of file
diff --git a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt
index 8e95699b17..95632e1942 100644
--- a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt
+++ b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
@@ -30,7 +31,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public Client(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -46,7 +49,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
@@ -512,7 +514,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public ExampleClient(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -528,7 +532,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
diff --git a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt
index c74ff13569..6bfd4f992a 100644
--- a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt
+++ b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpClientsAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
@@ -30,7 +31,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public Client(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -46,7 +49,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
@@ -506,7 +508,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public ExampleClient(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -522,7 +526,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
diff --git a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt
index 1385b85582..0ba154444c 100644
--- a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt
+++ b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET70Minimal_targetFramework=net7.0_generatesCode=True.verified.txt
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
diff --git a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt
index 1753c554fa..a93e4a75c8 100644
--- a/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt
+++ b/src/NSwag.ConsoleCore.Tests/GenerateSampleSpecificationTests.CheckCSharpControllersAsync_projectName=NSwag.Sample.NET80Minimal_targetFramework=net8.0_generatesCode=True.verified.txt
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
diff --git a/src/NSwag.Sample.NET70Minimal/GeneratedClientsCs.gen b/src/NSwag.Sample.NET70Minimal/GeneratedClientsCs.gen
index edf13c64e0..3c8e5dca06 100644
--- a/src/NSwag.Sample.NET70Minimal/GeneratedClientsCs.gen
+++ b/src/NSwag.Sample.NET70Minimal/GeneratedClientsCs.gen
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
@@ -30,7 +31,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public Client(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -46,7 +49,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
@@ -512,7 +514,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public ExampleClient(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -528,7 +532,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
diff --git a/src/NSwag.Sample.NET70Minimal/GeneratedControllersCs.gen b/src/NSwag.Sample.NET70Minimal/GeneratedControllersCs.gen
index 01b34ef79d..641ede3d21 100644
--- a/src/NSwag.Sample.NET70Minimal/GeneratedControllersCs.gen
+++ b/src/NSwag.Sample.NET70Minimal/GeneratedControllersCs.gen
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
diff --git a/src/NSwag.Sample.NET80Minimal/GeneratedClientsCs.gen b/src/NSwag.Sample.NET80Minimal/GeneratedClientsCs.gen
index 37964bcaba..34ea81654c 100644
--- a/src/NSwag.Sample.NET80Minimal/GeneratedClientsCs.gen
+++ b/src/NSwag.Sample.NET80Minimal/GeneratedClientsCs.gen
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {
@@ -30,7 +31,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public Client(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -46,7 +49,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
@@ -506,7 +508,9 @@ namespace MyNamespace
         private System.Net.Http.HttpClient _httpClient;
         private static System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(CreateSerializerSettings, true);
 
+    #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         public ExampleClient(string baseUrl, System.Net.Http.HttpClient httpClient)
+    #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
             BaseUrl = baseUrl;
             _httpClient = httpClient;
@@ -522,7 +526,6 @@ namespace MyNamespace
         public string BaseUrl
         {
             get { return _baseUrl; }
-            [System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_baseUrl))]
             set
             {
                 _baseUrl = value;
diff --git a/src/NSwag.Sample.NET80Minimal/GeneratedControllersCs.gen b/src/NSwag.Sample.NET80Minimal/GeneratedControllersCs.gen
index a8eb768c6a..53bc1be5cc 100644
--- a/src/NSwag.Sample.NET80Minimal/GeneratedControllersCs.gen
+++ b/src/NSwag.Sample.NET80Minimal/GeneratedControllersCs.gen
@@ -15,6 +15,7 @@
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
+#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
 
 namespace MyNamespace
 {