diff --git a/AyCode.Core/Extensions/PropertyHelper.cs b/AyCode.Core/Extensions/PropertyHelper.cs
new file mode 100644
index 0000000..a2078a4
--- /dev/null
+++ b/AyCode.Core/Extensions/PropertyHelper.cs
@@ -0,0 +1,24 @@
+using System.Collections;
+using System.Reflection;
+
+namespace AyCode.Core.Extensions;
+
+public static class PropertyHelper
+{
+    public static TDestination CopyPublicProperties<TSource, TDestination>(TSource src, TDestination dest)
+    {
+        if (src == null || dest == null) return dest;
+
+        var srcProps = typeof(TSource).GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(p => p.CanRead);
+
+        foreach (var sp in srcProps)
+        {
+            var dp = typeof(TDestination).GetProperty(sp.Name, BindingFlags.Public | BindingFlags.Instance);
+            if (dp == null || !dp.CanWrite || dp is IEnumerable) continue;
+
+            dp.SetValue(dest, sp.GetValue(src));
+        }
+
+        return dest;
+    }
+}
\ No newline at end of file
diff --git a/AyCode.Interfaces/ICustomForeignKey.cs b/AyCode.Interfaces/ICustomForeignKey.cs
new file mode 100644
index 0000000..7851f33
--- /dev/null
+++ b/AyCode.Interfaces/ICustomForeignKey.cs
@@ -0,0 +1,12 @@
+namespace AyCode.Interfaces;
+
+public interface ICustomForeignKeyInt : ICustomForeignKey<int>
+{ }
+
+public interface ICustomForeignKeyGuid : ICustomForeignKey<Guid>
+{ }
+
+public interface ICustomForeignKey<out T>
+{
+    T ForeignKey { get; }
+}
\ No newline at end of file