添加项目文件。

Util/CommonCode.cs

@@ -0,0 +1,59 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.Serialization.Formatters.Binary;
+using System.Text;
+using System.Threading.Tasks;
+using GeekDesk.ViewModel;
+
+/// <summary>
+/// 提取一些代码
+/// </summary>
+namespace GeekDesk.Util
+{
+    class CommonCode
+    {
+        private static string appConfigFilePath = AppDomain.CurrentDomain.BaseDirectory.Trim() + "\\config";
+        /// <summary>
+        /// 获取app配置
+        /// </summary>
+        /// <returns></returns>
+        public static AppConfig GetAppConfig()
+        {
+            AppConfig config;
+            if (!File.Exists(appConfigFilePath))
+            {
+                using (FileStream fs = File.Create(appConfigFilePath)) { }
+                config = new AppConfig();
+                SaveAppConfig(config);
+                   
+            }
+            else
+            {
+                using (FileStream fs = new FileStream(appConfigFilePath, FileMode.Open))
+                {
+                    BinaryFormatter bf = new BinaryFormatter();
+                    string json = bf.Deserialize(fs) as string;
+                    config = JsonConvert.DeserializeObject<AppConfig>(json);
+                }
+            }
+            return config;
+        }
+
+        /// <summary>
+        /// 保存app配置
+        /// </summary>
+        /// <param name="config"></param>
+        public static void SaveAppConfig(AppConfig config)
+        {
+            using (FileStream fs = new FileStream(appConfigFilePath, FileMode.Create))
+            {
+                BinaryFormatter bf = new BinaryFormatter();
+                string json = JsonConvert.SerializeObject(config);
+                bf.Serialize(fs, json);
+            }
+        }
+    }
+}