示例工程版本提升至net462，项目添加了部分空引用检测逻辑。累了，消不完的空引用警告(T.T）

Net462DllTest/View/FromWorkBenchView.cs

@@ -0,0 +1,62 @@
+using Net462DllTest.Device;
+using Net462DllTest.Signal;
+using Net462DllTest.ViewModel;
+using Serein.Library.Api;
+using Serein.Library.Attributes;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Net462DllTest
+{
+    public partial class FromWorkBenchView : Form
+    {
+        private FromWorkBenchViewModel ViewModel;
+
+        public FromWorkBenchView(IFlowEnvironment env)
+        {
+            ViewModel = env.IOC.Instantiate<FromWorkBenchViewModel>(); // 创建对象并注入依赖项
+            InitializeComponent();
+            Init();
+        }
+
+        public void Init()
+        {
+            listBox1.Items.Clear();
+            var enumValues = Enum.GetValues(typeof(CommandSignal)).Cast<CommandSignal>();
+            foreach (var value in enumValues)
+            {
+                listBox1.Items.Add(value.ToString());
+            }
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            textBoxPlcInfo.Text =  ViewModel.GetDeviceInfo();
+        }
+
+        private void button2_Click(object sender, EventArgs e)
+        {
+            if(listBox1.SelectedItem is null)
+            {
+                return;
+            }
+            string type = listBox1.SelectedItem.ToString();
+            
+            if (!string.IsNullOrEmpty(type) &&  Enum.TryParse(type, out CommandSignal signal) && Enum.IsDefined(typeof(CommandSignal), signal))
+            {
+                Console.WriteLine($"Trigger : {type}");
+                ViewModel.Trigger(signal,textBoxSpaceNum.Text);
+            }
+            
+        }
+        
+        
+    }
+}