This method is the safest and most modern approach.
Microsoft has changed how it distributes older software development kits (SDKs) and developer packs. Official Download Strategy
The installation process places the reference assemblies into a specific system directory. Verify the installation by navigating to: C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\
| | Description & Link | | :--- | :--- | | Microsoft Learn Guide | The primary resource. It provides a comprehensive list of links for all .NET Framework versions, from 4.5 to 4.8.1. | | Developer Packs Hub | A centralized download hub for .NET Framework targeting packs and developer packs. | | Visual Studio Build Tools | An alternative method for downloading the targeting pack. You can run the Visual Studio 2017 or 2019 Build Tools installer and select the ".NET Framework 4.5 Targeting Pack" from the "Individual components" tab. | | NuGet Package (Workaround) | This is a fallback method if the official links are unavailable. You can download the Microsoft.NETFramework.ReferenceAssemblies.net45 package from NuGet. | net framework 45 developer pack link
After installation, check:
If you have an active internet connection and Visual Studio 2017 or newer, you do not need to hunt for a separate . You can use the Visual Studio Installer:
. To develop or maintain applications targeting this specific version, you must use specific workarounds or later compatible developer packs. Stack Overflow Recommended Official Links and Workarounds This method is the safest and most modern approach
Click next to your active Visual Studio installation. Switch to the Individual Components tab at the top.
: Newer versions receive active security patches to protect applications against modern cyber threats.
Localization files to display error messages and help files in different languages. Verify the installation by navigating to: C:\Program Files
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Ensure you are using a Visual Studio version that supports older targeting packs. Open the Visual Studio Installer , go to Individual Components , scroll down to the .NET section, and ensure that the .NET Framework 4.5 targeting pack check box is ticked. 3. Blocked Installation on Modern Windows OS