Microsoft .NET Framework 4 Multi-Targeting Pack is a developer tool that allows you to build applications in Visual Studio that run on specific versions of the .NET Framework 4.0, even if you have a newer version (like 4.5 or 4.8) installed on your machine. Super User Its primary features and benefits include: Version Selection
: The pack installs the necessary "blueprints" (reference assemblies) that the compiler uses to verify your code against .NET 4 standards. Design-Time Support IntelliSense microsoft .net framework 4 multi targeting pack
You are mixing a project that targets .NET 4.0 with a project or NuGet package that uses .NET 4.5+ APIs. The multi-targeting pack correctly flags this ambiguity. Microsoft
What is .NET Multi-Targeting Pack?
This article dives deep into what the .NET Framework 4 Multi-Targeting Pack is, why you need it, how to install it, common troubleshooting errors, and best practices for managing multi-version environments. The multi-targeting pack correctly flags this ambiguity