diff --git a/DigitalData.Core.Infrastructure/DigitalData.Core.Infrastructure.csproj b/DigitalData.Core.Infrastructure/DigitalData.Core.Infrastructure.csproj
index 679c0fc..08ab3d0 100644
--- a/DigitalData.Core.Infrastructure/DigitalData.Core.Infrastructure.csproj
+++ b/DigitalData.Core.Infrastructure/DigitalData.Core.Infrastructure.csproj
@@ -1,9 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net7.0;net8.0;net9.0</TargetFrameworks>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
+    <TargetFrameworks>net462;net7.0;net8.0;net9.0</TargetFrameworks>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <PackageId>DigitalData.Core.Infrastructure</PackageId>
     <Authors>Digital Data GmbH</Authors>
@@ -27,6 +25,24 @@
     </None>
   </ItemGroup>
 
+  <!-- disable for net462 -->
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net462'">
+	<Nullable>disable</Nullable>
+	<ImplicitUsings>disable</ImplicitUsings>
+	<LangVersion>7.3</LangVersion>
+  </PropertyGroup>
+
+  <!-- enable for net7 and more -->
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net7.0' Or '$(TargetFramework)' == 'net8.0' Or '$(TargetFramework)' == 'net9.0'">
+	<Nullable>enable</Nullable>
+	<ImplicitUsings>enable</ImplicitUsings>
+	<LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'net462'">
+	<PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.32" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.20" />
   </ItemGroup>