Have you tried ML.NET?
It's a new machine learning framework made specifically for .NET developers.
.NET Core Preview
Want to try out the latest preview? .NET Core 3.0.0-preview-27122-01 is available.

.NET Framework 4.5.2 downloads

Not sure what to download? Head to our main Downloads page to find recommended downloads for the latest version of .NET.

.NET Framework 4.5.2  Build apps - Dev Pack  Run apps - Runtime
Web installer  N/A Runtime
Offline installer  Developer pack N/A

Looking for a different version? See the download archives.