具体应用呢，不多说了，上代码，取长补短就是原创

using OPCAutomation;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace XSDLOPCClinet
{
    public partial class Form1 : Form
    {
        OPCServer ObjOPCServer;
        OPCGroups ObjOPCGroups;
        OPCGroup ObjOPCGroup;
        string OPCServerName;
        private OPCItem[] OPC_ITEMS_ADDED;
        Dictionary<string, string> MAP_CLIENTHANDLE_TAG = new Dictionary<string, string>();

        public Form1()
        {
            try
            {
                InitializeComponent();
                InitServer();// 启动服务
            }
            catch (Exception e)
            {
                MessageBox.Show("cuowu1"+e.Message);
            }
        }

        private void InitServer()
        {
            OPCServerName = "Kepware.KEPServerEX.V5";
            ObjOPCServer = new OPCServer();
            ObjOPCServer.Connect(OPCServerName, "127.0.0.1");
            if (ObjOPCServer.ServerState == (int)OPCServerState.OPCRunning)
            {
                label1.Text = $"OPC服务器名：{ObjOPCServer.ServerName}";
                label4.Text = $"连接启动时间：{ObjOPCServer.StartTime.ToString()}";
                label3.Text = "服务运行中，请勿关闭";
                //创建并设置组
                bool bSucce = this.InitGetDataConfig();
                //group添加items
                AddGroupItems();
                //采集opc数据
                GetOPCData();
            }
            else
            {
                label3.Text = "OPC服务器状态异常: " + ObjOPCServer.ServerState.ToString();
            }
        }

        private bool InitGetDataConfig()
        {
            ObjOPCGroups = ObjOPCServer.OPCGroups;
            ObjOPCGroup = ObjOPCGroups.Add();// 初始化Groups组
            ObjOPCGroup.DataChange += new DIOPCGroupEvent_DataChangeEventHandler(GroupAsyncReadComplete);
            ObjOPCGroup.IsActive = true;
            ObjOPCGroup.IsSubscribed = true;
            ObjOPCServer.OPCGroups.DefaultGroupDeadband = 0;// 死区值，设为0时，服务器端该组内任何数据变化都通知组
            return true;
        }

        private void GetOPCData()
        {
            try
            {
                //异步读opc数据
                int[] temp = new int[OPC_ITEMS_ADDED.Length + 1];
                temp[0] = 0;
                for (int i = 1; i <= OPC_ITEMS_ADDED.Length; i++)
                {
                    temp[i] = OPC_ITEMS_ADDED[i - 1].ServerHandle;
                }
                Array serverHandles = (Array)temp;
                Array Errors;
                int cancelID;
                Random rd = new Random();
                int TransactionID = rd.Next(1, 100);
                ObjOPCGroup.AsyncRead(serverHandles.Length - 1, ref serverHandles, out Errors, TransactionID, out cancelID);//第一参数为item数量
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        private void AddGroupItems()
        {
            List<string> l_str = new List<string>();
            //读取配置文件，获取需要的传感器ID
            l_str.Add("10A.PLC");
            l_str.Add("10B.PLC");
            List<OPCItem> ItemsAdded = new List<OPCItem>();
            int n = 0;
            foreach (string tag in l_str)
            {
                ItemsAdded.Add(ObjOPCGroup.OPCItems.AddItem($"{tag}.address12138", n));
                //clientHandle tag关系
                MAP_CLIENTHANDLE_TAG.Add(n + "", tag);
                n++;
            }
            OPC_ITEMS_ADDED = ItemsAdded.ToArray();
        }
        // 异步获取t,v信息
        private void GroupAsyncReadComplete(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)
        {
            try
            {
                //C# Dictionary 字典 
                Dictionary<string, string> tagValueMap = new Dictionary<string, string>();
                for (int i = 1; i <= NumItems; i++)
                {
                    string clientHandle = ClientHandles.GetValue(i).ToString();
                    string tag = MAP_CLIENTHANDLE_TAG[clientHandle];
                    string val = ItemValues.GetValue(i).ToString();
                    //C# Dictionary 字典 添加数据
                    tagValueMap.Add(tag, val);
                   
                }
                // 在这里可以调用SQL语句进行value值的更新，是异步的，不是同步更新
                // textBox1.Text = tagValueMap["10A.PLC"];
            }
            catch (Exception ex)
            {
                label3.Text = ex.Message;
            }
        }
       
        // 退出时释放资源
        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            ObjOPCServer.Disconnect();
        }

    }
}