diff --git a/src/YuckQi.Domain.Services/YuckQi.Domain.Services.csproj b/src/YuckQi.Domain.Services/YuckQi.Domain.Services.csproj
index f35c857..5bc311c 100644
--- a/src/YuckQi.Domain.Services/YuckQi.Domain.Services.csproj
+++ b/src/YuckQi.Domain.Services/YuckQi.Domain.Services.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Kevin J Lambert</Authors>
-    <Version>6.4.0</Version>
+    <Version>6.4.1</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <Description>A .NET library for bootstrapping a domain services project.</Description>
     <Nullable>enable</Nullable>
diff --git a/src/YuckQi.Domain.Validation/YuckQi.Domain.Validation.csproj b/src/YuckQi.Domain.Validation/YuckQi.Domain.Validation.csproj
index 2b3c7ef..8ba0233 100644
--- a/src/YuckQi.Domain.Validation/YuckQi.Domain.Validation.csproj
+++ b/src/YuckQi.Domain.Validation/YuckQi.Domain.Validation.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Kevin J Lambert</Authors>
-    <Version>6.4.0</Version>
+    <Version>6.4.1</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <Description>A .NET library providing domain validation fundamentals.</Description>
     <Nullable>enable</Nullable>
diff --git a/src/YuckQi.Domain/Extensions/ObjectExtensions.cs b/src/YuckQi.Domain/Extensions/ObjectExtensions.cs
index 2a47fd0..16a63fd 100644
--- a/src/YuckQi.Domain/Extensions/ObjectExtensions.cs
+++ b/src/YuckQi.Domain/Extensions/ObjectExtensions.cs
@@ -12,10 +12,24 @@ public static class ObjectExtensions
 
     public static Dictionary<PropertyInfo, (Object?, Object?)> GetDifferencesByProperty<T>(this T a, T b)
     {
-        var properties = PropertiesByType.GetOrAdd(typeof(T), type => type.GetProperties());
+        var properties = GetObjectProperties(typeof(T));
         var values = properties.Select(t => new KeyValuePair<PropertyInfo, (Object?, Object?)>(t, (t.GetValue(a), t.GetValue(b))));
-        var differences = values.Where(t => ! Equals(t.Value.Item1, t.Value.Item2)).ToDictionary(t => t.Key, t => t.Value);
+        var result = values.Where(t => ! Equals(t.Value.Item1, t.Value.Item2)).ToDictionary(t => t.Key, t => t.Value);
 
-        return differences;
+        return result;
+    }
+
+    public static HashSet<PropertyInfo> GetNonNullProperties<T>(this T a)
+    {
+        var properties = GetObjectProperties(typeof(T));
+        var values = properties.Select(t => new KeyValuePair<PropertyInfo, Object?>(t, t.GetValue(a)));
+        var result = values.Where(t => t.Value != null).Select(t => t.Key).ToHashSet();
+
+        return result;
+    }
+
+    private static IEnumerable<PropertyInfo> GetObjectProperties(Type type)
+    {
+        return PropertiesByType.GetOrAdd(type, t => t.GetProperties());
     }
 }
diff --git a/src/YuckQi.Domain/YuckQi.Domain.csproj b/src/YuckQi.Domain/YuckQi.Domain.csproj
index 359cfdf..cbad02a 100644
--- a/src/YuckQi.Domain/YuckQi.Domain.csproj
+++ b/src/YuckQi.Domain/YuckQi.Domain.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Kevin J Lambert</Authors>
-    <Version>6.4.0</Version>
+    <Version>6.4.1</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <Description>A .NET library for bootstrapping a domain model project.</Description>
     <Nullable>enable</Nullable>
diff --git a/test/YuckQi.Domain.UnitTests/Extensions/ObjectExtensionTests.cs b/test/YuckQi.Domain.UnitTests/Extensions/ObjectExtensionTests.cs
index ea35392..25b0310 100644
--- a/test/YuckQi.Domain.UnitTests/Extensions/ObjectExtensionTests.cs
+++ b/test/YuckQi.Domain.UnitTests/Extensions/ObjectExtensionTests.cs
@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using NUnit.Framework;
 using YuckQi.Domain.Extensions;
 
@@ -14,11 +15,21 @@ public void Objects_WithDifferentStringValues_HaveOneDifference()
     {
         var a = new { a = 123, b = "test" };
         var b = new { a = 123, b = "hello" };
-        var differences = a.GetDifferencesByProperty(b);
+        var result = a.GetDifferencesByProperty(b);
 
-        Assert.That(differences, Has.Exactly(1).Items);
-        Assert.That(differences.Single().Key.Name, Is.EqualTo(nameof(a.b)));
-        Assert.That(differences.Single().Value.Item1, Is.EqualTo("test"));
-        Assert.That(differences.Single().Value.Item2, Is.EqualTo("hello"));
+        Assert.That(result, Has.Exactly(1).Items);
+        Assert.That(result.Single().Key.Name, Is.EqualTo(nameof(a.b)));
+        Assert.That(result.Single().Value.Item1, Is.EqualTo("test"));
+        Assert.That(result.Single().Value.Item2, Is.EqualTo("hello"));
+    }
+
+    [Test]
+    public void Object_WithSomeNonNullProperties_HasExpectedValue()
+    {
+        var a = new { a = new Int32?(), b = 1234, c = "hello", d = new Int64?(9999) };
+        var result = a.GetNonNullProperties();
+
+        Assert.That(result, Has.Exactly(3).Items);
+        Assert.That(result.Select(t => t.Name), Does.Not.Contain("a"));
     }
 }