下面是一个使用System.Management类的快速而肮脏的方法。

using System;
using System.Collections.Generic;
using System.Text;
using System.Management;

namespace ServiceTest
{
  class Program
  {
    static void Main(string[] args)
    {
      string theServiceName = "My Windows Service";
      string objectPath = string.Format("Win32_Service.Name='{0}'", theServiceName);
      using (ManagementObject mngService = new ManagementObject(new ManagementPath(objectPath)))
      {
        object[] wmiParameters = new object[11];
        wmiParameters[6] = @"domain\username";
        wmiParameters[7] = "password";
        mngService.InvokeMethod("Change", wmiParameters);
      }
    }
  }
}

ChangeServiceConfig是我过去使用的方法。WMI可能有点不稳定，我只想在没有其他选择的情况下使用它，尤其是在远程计算机上。

下面是一个使用System.Management类的带有参数和返回值的方法。

using System;
using System.Management;

namespace ChangeServiceCredentials
{
    public class ServiceUtil
    {
        /// <summary>
        /// Changes the user that a service runs under.
        /// </summary>
        /// <param name="serviceName">Name of the service to alter.</param>
        /// <param name="userName">Username to use as the new identity.</param>
        /// <param name="password">Password of the new identity.</param>
        public static UInt32 SetWindowsServiceCredentials(String serviceName, String userName, String password)
        {
            var servicePath = $"Win32_Service.Name='{serviceName}'";
            using (var service = new ManagementObject(new ManagementPath(servicePath)))
            {
                var wmiParams = new Object[10];

                wmiParams[6] = userName;
                wmiParams[7] = password;
                return (UInt32)service.InvokeMethod("Change", wmiParams);
            }
        }
    }
}