1. 首先，在ASP.Net Core的Startup.cs文件中，注册SSH客户端服务：

services.AddTransient();

2. 在创建SSH客户端的类SshClient.cs中，实现ISshClient接口：

public interface ISshClient
{
    string ExecuteCommand(string host, string user, string password, int port, string command);
}

public class SshClient : ISshClient
{
    public string ExecuteCommand(string host, string user, string password, int port, string command)
    {
        using (var client = new SshClient(host, port, user, password))
        {
            client.Connect();
            var result = client.RunCommand(command);
            return result.Result;
        }
    }
}

3. 在Controller中，注入ISshClient：

private readonly ISshClient _sshClient;

public MyController(ISshClient sshClient)
{
    _sshClient = sshClient;
}

public IActionResult Index()
{
    var result = _sshClient.ExecuteCommand("host", "user", "password", 22, "ls -la");
    //处理结果
    return View();
}