BIP39 & BIP32 C# example implementation

bip39+bip32.cs

/*
  This code allows you to export BIP39 12 words phrase and use it with Ethereum/Loom 
  
  To check Popular derivative paths look here https://www.myetherwallet.com/#view-wallet-info 
  Or here is quick cheatsheet https://gyazo.com/a4199116750b57a02917eb255d4c033e 
  
  Dependency on very nice library https://github.com/MetacoSA/NBitcoin - clone and build it
*/

using NBitcoin; 
using Org.BouncyCastle.Asn1.Sec;
using Org.BouncyCastle.Math;

public bool LoadFromMnemonic(string mnemonicPhrase, string keyPath = "m/44'/60'/0'/0", string password = null) {
    try {
        var mnemonic = new Mnemonic(mnemonicPhrase);
        var keyPathToDerive = KeyPath.Parse(keyPath);
        var pk = new ExtKey(mnemonic.DeriveSeed(password)).Derive(keyPathToDerive);
        ExtKey keyNew = pk.Derive(0);
        var pkeyBytes = keyNew.PrivateKey.PubKey.ToBytes();
        var ecParams = SecNamedCurves.GetByName("secp256k1");
        var point = ecParams.Curve.DecodePoint(pkeyBytes);
        var xCoord = point.XCoord.GetEncoded();
        var yCoord = point.YCoord.GetEncoded();
        var uncompressedBytes = new byte[64];
        // copy X coordinate
        Array.Copy(xCoord, uncompressedBytes, xCoord.Length);
        // copy Y coordinate
        for (int i = 0; i < 32 && i < yCoord.Length; i++) {
            uncompressedBytes[uncompressedBytes.Length - 1 - i] = yCoord[yCoord.Length - 1 - i];
        }
        var PrivateKey = keyNew.PrivateKey.ToBytes();
        var PublicKey = pkeyBytes;
        // ethereum address is last 20 bytes of keccak(uncompressed public key)
        // use any c# keccak implementation.
        var PublicKeyString = CryptoUtils.BytesToHexString(Utils.Solidity.Keccak(uncompressedBytes)).Substring(24);
    } catch (Exception _) {
        return false;
    }
    
    return true;
}