diff --git a/BinaryObjectScanner/BinaryObjectScanner.csproj b/BinaryObjectScanner/BinaryObjectScanner.csproj
index cd54ca04..c08d5dda 100644
--- a/BinaryObjectScanner/BinaryObjectScanner.csproj
+++ b/BinaryObjectScanner/BinaryObjectScanner.csproj
@@ -78,6 +78,7 @@
     <!-- Support for old .NET versions -->
     <ItemGroup Condition="$(TargetFramework.StartsWith(`net2`))">
         <PackageReference Include="Net30.LinqBridge" Version="1.3.0" />
+        <PackageReference Include="Net35.Actions" Version="1.1.0" />
     </ItemGroup>
     <ItemGroup Condition="!$(TargetFramework.StartsWith(`net2`)) AND !$(TargetFramework.StartsWith(`net3`))">
         <PackageReference Include="OpenMcdf" Version="2.3.1" />
diff --git a/BinaryObjectScanner/ExtensionAttribute.cs b/BinaryObjectScanner/ExtensionAttribute.cs
new file mode 100644
index 00000000..f7d035b2
--- /dev/null
+++ b/BinaryObjectScanner/ExtensionAttribute.cs
@@ -0,0 +1,9 @@
+#if NET20
+
+namespace System.Runtime.CompilerServices
+{
+    [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Method)]
+    internal sealed class ExtensionAttribute : Attribute {}
+}
+
+#endif
\ No newline at end of file