To get started with the .NET Framework 4 Multi-Targeting Pack, follow these steps:
Error looks like: "The reference assemblies for framework .NETFramework,Version=v4.0 were not found"
Install the .NET Framework developer pack or redistributable microsoft .net framework 4 multi targeting pack
Also, remove any <TargetFrameworkIdentifier> or <TargetFrameworkProfile> unless you specifically need Client Profile (rare).
Microsoft also offers a which includes both the runtime and the targeting pack. If you install the Dev Pack, you do not need the standalone multi-targeting pack. However, the Dev Pack for .NET 4.0 is ancient (2011) and not recommended for modern VS. To get started with the
choco install netfx-4.0-multitargetingpack
Navigate to: C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0 However, the Dev Pack for
Consider sunsetting your .NET 4.0 support if:
Modern .NET (formerly .NET Core) uses a :
: It enables developers to create and compile applications for .NET Framework 4 even if they have a newer version (like 4.8) installed on their machine.
It ensures that your code only uses APIs available in that specific version, preventing "it works on my machine" bugs when deploying to older servers. Key Features of the .NET 4 Multi-Targeting Pack Design-Time Support: