diff --git a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net472.approved.txt b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net472.approved.txt
index 9f4af14a9e..90089dcd68 100644
--- a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net472.approved.txt
+++ b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net472.approved.txt
@@ -300,6 +300,10 @@ namespace ReactiveUI
             where TSender : ReactiveUI.IReactiveObject { }
         public static void RaisePropertyChanging<TSender>(this TSender reactiveObject, [System.Runtime.CompilerServices.CallerMemberName] string? propertyName = null)
             where TSender : ReactiveUI.IReactiveObject { }
+        public static void SubscribePropertyChangedEvents<TSender>(this TSender reactiveObject)
+            where TSender : ReactiveUI.IReactiveObject { }
+        public static void SubscribePropertyChangingEvents<TSender>(this TSender reactiveObject)
+            where TSender : ReactiveUI.IReactiveObject { }
     }
     public interface IReactivePropertyChangedEventArgs<out TSender>
     {
@@ -658,8 +662,8 @@ namespace ReactiveUI
         protected virtual bool PrintMembers(System.Text.StringBuilder builder) { }
         public System.IDisposable SuppressChangeNotifications() { }
         public override string ToString() { }
-        public static bool operator !=(ReactiveUI.ReactiveRecord? r1, ReactiveUI.ReactiveRecord? r2) { }
-        public static bool operator ==(ReactiveUI.ReactiveRecord? r1, ReactiveUI.ReactiveRecord? r2) { }
+        public static bool operator !=(ReactiveUI.ReactiveRecord? left, ReactiveUI.ReactiveRecord? right) { }
+        public static bool operator ==(ReactiveUI.ReactiveRecord? left, ReactiveUI.ReactiveRecord? right) { }
     }
     public static class Reflection
     {
@@ -931,4 +935,4 @@ namespace System.Reactive.Disposables
         public static T DisposeWith<T>(this T item, System.Reactive.Disposables.CompositeDisposable compositeDisposable)
             where T : System.IDisposable { }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net5.0.approved.txt b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net5.0.approved.txt
index f0f88b0dab..1c8ae13450 100644
--- a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net5.0.approved.txt
+++ b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net5.0.approved.txt
@@ -295,6 +295,10 @@ namespace ReactiveUI
             where TSender : ReactiveUI.IReactiveObject { }
         public static void RaisePropertyChanging<TSender>(this TSender reactiveObject, [System.Runtime.CompilerServices.CallerMemberName] string? propertyName = null)
             where TSender : ReactiveUI.IReactiveObject { }
+        public static void SubscribePropertyChangedEvents<TSender>(this TSender reactiveObject)
+            where TSender : ReactiveUI.IReactiveObject { }
+        public static void SubscribePropertyChangingEvents<TSender>(this TSender reactiveObject)
+            where TSender : ReactiveUI.IReactiveObject { }
     }
     public interface IReactivePropertyChangedEventArgs<out TSender>
     {
@@ -653,8 +657,8 @@ namespace ReactiveUI
         protected virtual bool PrintMembers(System.Text.StringBuilder builder) { }
         public System.IDisposable SuppressChangeNotifications() { }
         public override string ToString() { }
-        public static bool operator !=(ReactiveUI.ReactiveRecord? r1, ReactiveUI.ReactiveRecord? r2) { }
-        public static bool operator ==(ReactiveUI.ReactiveRecord? r1, ReactiveUI.ReactiveRecord? r2) { }
+        public static bool operator !=(ReactiveUI.ReactiveRecord? left, ReactiveUI.ReactiveRecord? right) { }
+        public static bool operator ==(ReactiveUI.ReactiveRecord? left, ReactiveUI.ReactiveRecord? right) { }
     }
     public static class Reflection
     {
@@ -926,4 +930,4 @@ namespace System.Reactive.Disposables
         public static T DisposeWith<T>(this T item, System.Reactive.Disposables.CompositeDisposable compositeDisposable)
             where T : System.IDisposable { }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.netcoreapp3.1.approved.txt b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.netcoreapp3.1.approved.txt
index 7a858719b5..eb7f8699cd 100644
--- a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.netcoreapp3.1.approved.txt
+++ b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.netcoreapp3.1.approved.txt
@@ -293,6 +293,10 @@ namespace ReactiveUI
             where TSender : ReactiveUI.IReactiveObject { }
         public static void RaisePropertyChanging<TSender>(this TSender reactiveObject, [System.Runtime.CompilerServices.CallerMemberName] string? propertyName = null)
             where TSender : ReactiveUI.IReactiveObject { }
+        public static void SubscribePropertyChangedEvents<TSender>(this TSender reactiveObject)
+            where TSender : ReactiveUI.IReactiveObject { }
+        public static void SubscribePropertyChangingEvents<TSender>(this TSender reactiveObject)
+            where TSender : ReactiveUI.IReactiveObject { }
     }
     public interface IReactivePropertyChangedEventArgs<out TSender>
     {
@@ -651,8 +655,8 @@ namespace ReactiveUI
         protected virtual bool PrintMembers(System.Text.StringBuilder builder) { }
         public System.IDisposable SuppressChangeNotifications() { }
         public override string ToString() { }
-        public static bool operator !=(ReactiveUI.ReactiveRecord? r1, ReactiveUI.ReactiveRecord? r2) { }
-        public static bool operator ==(ReactiveUI.ReactiveRecord? r1, ReactiveUI.ReactiveRecord? r2) { }
+        public static bool operator !=(ReactiveUI.ReactiveRecord? left, ReactiveUI.ReactiveRecord? right) { }
+        public static bool operator ==(ReactiveUI.ReactiveRecord? left, ReactiveUI.ReactiveRecord? right) { }
     }
     public static class Reflection
     {
@@ -924,4 +928,4 @@ namespace System.Reactive.Disposables
         public static T DisposeWith<T>(this T item, System.Reactive.Disposables.CompositeDisposable compositeDisposable)
             where T : System.IDisposable { }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ReactiveUI.Tests/Platforms/windows-xaml/PropertyBindingTest.cs b/src/ReactiveUI.Tests/Platforms/windows-xaml/PropertyBindingTest.cs
index 3b28e4a8be..0815bec3ae 100644
--- a/src/ReactiveUI.Tests/Platforms/windows-xaml/PropertyBindingTest.cs
+++ b/src/ReactiveUI.Tests/Platforms/windows-xaml/PropertyBindingTest.cs
@@ -114,10 +114,10 @@ public void TypeConvertedTwoWayBindSmokeTest()
             vm.JustADecimal = 17.2m;
             var disp1 = fixture.Bind(vm, view, x => x.JustADecimal, x => x.SomeTextBox.Text, (IObservable<Unit>?)null, null);
 
-            Assert.Equal(vm.JustADecimal.ToString(CultureInfo.InvariantCulture), view.SomeTextBox.Text);
+            Assert.Equal(vm.JustADecimal.ToString(CultureInfo.CurrentCulture), view.SomeTextBox.Text);
             Assert.Equal(17.2m, vm.JustADecimal);
 
-            view.SomeTextBox.Text = 42.3m.ToString(CultureInfo.InvariantCulture);
+            view.SomeTextBox.Text = 42.3m.ToString(CultureInfo.CurrentCulture);
             Assert.Equal(42.3m, vm.JustADecimal);
 
             // Bad formatting.
diff --git a/src/ReactiveUI.Tests/Platforms/winforms/DefaultPropertyBindingTests.cs b/src/ReactiveUI.Tests/Platforms/winforms/DefaultPropertyBindingTests.cs
index 8aed8d1095..2024acdd85 100644
--- a/src/ReactiveUI.Tests/Platforms/winforms/DefaultPropertyBindingTests.cs
+++ b/src/ReactiveUI.Tests/Platforms/winforms/DefaultPropertyBindingTests.cs
@@ -143,7 +143,7 @@ public void CanBindViewModelToWinformControls()
             var disp2 = view.Bind(vm, x => x.SomeDouble, x => x.Property3.Text);
             vm.SomeDouble = 123.4;
 
-            Assert.Equal(vm.SomeDouble.ToString(CultureInfo.InvariantCulture), view.Property3.Text);
+            Assert.Equal(vm.SomeDouble.ToString(CultureInfo.CurrentCulture), view.Property3.Text);
         }
 
         /// <summary>
diff --git a/src/ReactiveUI.Tests/Utilities/ApiApprovalBase.cs b/src/ReactiveUI.Tests/Utilities/ApiApprovalBase.cs
index 08ae4ff50e..62b2b9e167 100644
--- a/src/ReactiveUI.Tests/Utilities/ApiApprovalBase.cs
+++ b/src/ReactiveUI.Tests/Utilities/ApiApprovalBase.cs
@@ -83,7 +83,7 @@ protected static void CheckApproval(Assembly assembly, [CallerMemberName]string?
                 }
             }
 
-            Assert.Equal(approvedPublicApi, receivedPublicApi);
+            Assert.Equal(approvedPublicApi.Trim(), receivedPublicApi);
         }
 
         private static string Filter(string text)
diff --git a/src/ReactiveUI/ReactiveObject/IReactiveObjectExtensions.cs b/src/ReactiveUI/ReactiveObject/IReactiveObjectExtensions.cs
index ca33ae1fe5..4cef832fb8 100644
--- a/src/ReactiveUI/ReactiveObject/IReactiveObjectExtensions.cs
+++ b/src/ReactiveUI/ReactiveObject/IReactiveObjectExtensions.cs
@@ -170,6 +170,34 @@ public static void RaisePropertyChanging<TSender>(this TSender reactiveObject, [
             }
         }
 
+        /// <summary>
+        /// Use this method for enabling classic PropertyChanging events when you
+        /// are implementing IReactiveObject manually.
+        /// </summary>
+        /// <typeparam name="TSender">The sender type.</typeparam>
+        /// <param name="reactiveObject">The instance of IReactiveObject which should propagate property changes.</param>
+        public static void SubscribePropertyChangingEvents<TSender>(this TSender reactiveObject)
+            where TSender : IReactiveObject
+        {
+            var s = state.GetValue(reactiveObject, _ => (IExtensionState<IReactiveObject>)new ExtensionState<TSender>(reactiveObject));
+
+            s.SubscribePropertyChangingEvents();
+        }
+
+        /// <summary>
+        /// Use this method for enabling classic PropertyChanged events when you
+        /// are implementing IReactiveObject manually.
+        /// </summary>
+        /// <typeparam name="TSender">The sender type.</typeparam>
+        /// <param name="reactiveObject">The instance of IReactiveObject which should propagate property changes.</param>
+        public static void SubscribePropertyChangedEvents<TSender>(this TSender reactiveObject)
+            where TSender : IReactiveObject
+        {
+            var s = state.GetValue(reactiveObject, _ => (IExtensionState<IReactiveObject>)new ExtensionState<TSender>(reactiveObject));
+
+            s.SubscribePropertyChangedEvents();
+        }
+
         internal static IObservable<IReactivePropertyChangedEventArgs<TSender>> GetChangedObservable<TSender>(this TSender reactiveObject)
             where TSender : IReactiveObject
         {
@@ -191,14 +219,6 @@ internal static IObservable<Exception> GetThrownExceptionsObservable<TSender>(th
             return s.ThrownExceptions;
         }
 
-        internal static void SubscribePropertyChangingEvents<TSender>(this TSender reactiveObject)
-            where TSender : IReactiveObject
-        {
-            var s = state.GetValue(reactiveObject, _ => (IExtensionState<IReactiveObject>)new ExtensionState<TSender>(reactiveObject));
-
-            s.SubscribePropertyChangingEvents();
-        }
-
         internal static void RaisingPropertyChanging<TSender>(this TSender reactiveObject, string propertyName)
             where TSender : IReactiveObject
         {
@@ -212,14 +232,6 @@ internal static void RaisingPropertyChanging<TSender>(this TSender reactiveObjec
             s.RaisePropertyChanging(propertyName);
         }
 
-        internal static void SubscribePropertyChangedEvents<TSender>(this TSender reactiveObject)
-            where TSender : IReactiveObject
-        {
-            var s = state.GetValue(reactiveObject, _ => (IExtensionState<IReactiveObject>)new ExtensionState<TSender>(reactiveObject));
-
-            s.SubscribePropertyChangedEvents();
-        }
-
         internal static void RaisingPropertyChanged<TSender>(this TSender reactiveObject, string propertyName)
             where TSender : IReactiveObject
         {