U:调整调用方式和兼容性

src/Sharp/Config/ConfigBuilderExtensions.cs

@@ -0,0 +1,59 @@
+using Microsoft.Extensions.Configuration;
+
+namespace Config;
+
+public static class ConfigBuilderExtensions
+{
+    /// <summary>
+    /// 创建默认配置（约定优于配置）
+    /// 自动查找 appsettings.json，启用热重载和环境变量
+    /// </summary>
+    /// <param name="basePath">基础路径，默认为应用程序目录</param>
+    /// <param name="environmentPrefix">环境变量前缀，默认为 "APP_"</param>
+    /// <returns>配置管理器</returns>
+    public static ConfigManager CreateDefault(
+        string? basePath = null,
+        string? environmentPrefix = "APP_")
+    {
+        basePath ??= AppContext.BaseDirectory;
+
+        // 查找配置文件（appsettings.json, appsettings.Development.json 等）
+        var configFiles = new List<string> { "appsettings.json" };
+
+        // 根据环境添加特定配置
+        var environment = Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT")
+                       ?? Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT")
+                       ?? "Production";
+
+        var envConfigFile = $"appsettings.{environment}.json";
+        var envConfigPath = Path.Combine(basePath, envConfigFile);
+        if (File.Exists(envConfigPath))
+        {
+            configFiles.Add(envConfigFile);
+        }
+
+        // 构建配置
+        return ConfigBuilder.BuildFromFiles(
+            configFiles.ToArray(),
+            reloadOnChange: true,
+            includeEnvironment: true,
+            environmentPrefix: environmentPrefix,
+            basePath: basePath
+        );
+    }
+
+    /// <summary>
+    /// 创建最小化配置（只有 appsettings.json）
+    /// </summary>
+    public static ConfigManager CreateMinimal(string? basePath = null)
+    {
+        basePath ??= AppContext.BaseDirectory;
+
+        return ConfigBuilder.BuildFromFiles(
+            new[] { "appsettings.json" },
+            reloadOnChange: false,
+            includeEnvironment: false,
+            basePath: basePath
+        );
+    }
+}