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/ViewModel/FromWorkBenchViewModel.cs

@@ -0,0 +1,37 @@
+using Net462DllTest.Device;
+using Net462DllTest.Signal;
+using Serein.Library.Attributes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Net462DllTest.ViewModel
+{
+    public class FromWorkBenchViewModel
+    {
+        public FromWorkBenchViewModel(SiemensPlcDevice Device)
+        {
+            this.Device = Device;
+        }
+        private SiemensPlcDevice Device;
+
+        public string Name { get; set; }
+
+        public string GetDeviceInfo()
+        {
+            return Device?.ToString();
+        }
+
+        public void Trigger(CommandSignal signal,string spcaeNumber)
+        {
+            _ = Task.Run(() =>
+            {
+                Device.TriggerSignal(signal, spcaeNumber);
+            });
+        }
+
+
+    }
+}