添加项目文件。

Helpers/JsonConfigHelper.cs

@@ -0,0 +1,25 @@
+using ASTM_D7896_Tester.Models;
+using System.IO;
+using System.Text.Json;
+
+namespace ASTM_D7896_Tester.Helpers;
+
+public static class JsonConfigHelper
+{
+    private static readonly string ConfigPath = "appsettings.json";
+
+    public static AppConfig LoadConfig()
+    {
+        if (!File.Exists(ConfigPath))
+            throw new FileNotFoundException($"配置文件 {ConfigPath} 未找到。");
+        var json = File.ReadAllText(ConfigPath);
+        return JsonSerializer.Deserialize<AppConfig>(json) ?? new AppConfig();
+    }
+
+    public static void SaveConfig(AppConfig config)
+    {
+        var options = new JsonSerializerOptions { WriteIndented = true };
+        var json = JsonSerializer.Serialize(config, options);
+        File.WriteAllText(ConfigPath, json);
+    }
+}