Where do I download the .net framework sdks [Answered]

I have a rather old program I am trying to run and I need the sdk for 4.5.2 but on the https://dotnet.microsoft.com/en-us/download/visual-studio-sdks site the framework developer pack's don't install in the same way as the current sdks, where do they install and how do I get it working?
Microsoft
Download .NET SDKs for Visual Studio. Visit our main Downloads page for all .NET downloads, including Linux and macOS.
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