Cannot find RIPEMD160 in .net core

Microsoft decided to remove "managed" (fully implemented in .NET) implementations of hashing and crypto algorithms in .NET Core (don't ask me why). See for example https://github.com/dotnet/runtime/issues/2094 (that is exactly about RIPEMD160):

RIPEMD160 is not an algorithm that is provided by the OS crypto layers, and .NET Core no longer carries managed implementations of cryptographic algorithms.

And from msdn:

All hash algorithm and hash-based message authentication (HMAC) classes, including the *Managed classes, defer to the OS libraries. While the various OS libraries differ in performance, they should be compatible.

I can't find if there was a discussion about this, or if some manager decided that it was best to do in this way or what.

A simple solution is to grab the code used in .NET 4.7/.NET 4.8 and use it directly:

https://github.com/microsoft/referencesource/blob/master/mscorlib/system/security/cryptography/ripemd160managed.cs

The code is sourced as MIT, so there are no problems of licensing, see the homepage:

The files in this repository are licensed under the MIT license unless otherwise specified in the file header. If the file header only contains a copyright header (e.g., "Copyright (c) Microsoft Corporation. All rights reserved.", you can assume the associated file to be MIT-licensed.

I started to copy some classes from System.Security.Cryptography but because there are many attributes and dependencies on other classes/interfaces I don't like that solution.
Because Chilkat seems a little bit old (netstandard 1.3) and in the project I was already using BouncyCastle so in the end I just wrote this:

type RIPEMD160 () =
    static member ComputeHash (bytes: byte array) =
        let hasher =  Org.BouncyCastle.Crypto.Digests.RipeMD160Digest()
        hasher.BlockUpdate(bytes, 0, bytes.Length)
        let hash:byte array = Array.zeroCreate (hasher.GetDigestSize())
        hasher.DoFinal(hash, 0) |> ignore
        hash