使用LibGit2Sharp-SSH克隆GitHub仓库时遭遇SSH会话启动失败（无法交换加密密钥）问题求助

我现在尝试用LibGit2Sharp-SSH.NativeBinari（v1.0.15）和LibGit2Sharp-SSH-updated-libssh（v1.0.25）这两个库，通过下面的代码把GitHub上的仓库克隆到本地：

string repoURL = "ssh://git@github.com/MyUser/MyRepo.git"; 
string prm_localpath = @"D:\Github-Repositories\MyRepo"; // Replace with your desired local path
string privateKeyPath = @"C:/Users/MyUser/.ssh/id_rsa"; // Replace with your private key path
string publicKeyPath = @"C:/Users/MyUser/.ssh/id_rsa.pub"; // Usually, the public key has .pub extension
string passphrase = string.Empty; // If your key has a passphrase, enter it here

//git clone 
try
{
    
    var sshKey = new SshUserKeyCredentials
    {
        Username = "git",
        PrivateKey = privateKeyPath,
        PublicKey = publicKeyPath,
        Passphrase = passphrase
    };
    
    Repository.Clone(repoURL, prm_localpath, new CloneOptions
    {
        CredentialsProvider = (_url, _user, _cred) => sshKey
    });

    return "Cloned successfully";

}
catch (LibGit2SharpException ex)
{
    return ex.Message;
}
catch (Exception ex)
{
    return ex.Message;
}

但是运行后一直报错：Failed to start SSH session: Unable to exchange encryption keys

不过我在命令行里运行ssh -T git@github.com是正常的，返回：

Hi MyUser! You've successfully authenticated, but GitHub does not provide shell access.

而且用TortoiseGit的Git克隆功能也能成功，参数是：

URL = ssh://git@github.com/MyUser/MyRepo.git
Directory = D:\Github-Repositories\MyRepo
Load Putty Key = C:\Users\MyUser.ssh\id_rsa.ppk

直接用Git命令行克隆也没问题，命令是：

git clone git@github.com/MyUser/MyRepo.git D:\Github-Repositories\MyRepo

有没有大佬能帮忙看看代码哪里出问题了？提前谢谢大家！

备注：内容来源于stack exchange，提问作者Idoneus