Net Framework 45 Developer Pack — Link [exclusive]

Whether your app is a project.

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Without the Developer Pack, your computer might run .NET 4.5 apps perfectly, but Visual Studio will refuse to compile new code targeting that framework version. Whether your app is a project

Download and Install the .NET Framework 4.5 Developer Pack: A Complete Guide net framework 45 developer pack link

It populates the framework selection dropdown menu in your project properties.

Because version 4.5 is officially retired, Microsoft has largely consolidated its older downloads.