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如果发布的dll文件需要配置时，可以考虑把配置信息转到app.config，当然也可以不转移直接使用xxx.dll.config中的配置，当然需要保证程序执行目录下已经copy有xxx.dll.config文件了

代码入下，加入了文件监视缓存

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Reflection;
using System.IO;
using System.Web.Caching;
using System.Web;
namespace DotNet.A.Core
{public sealed class ModelSetting{public static string GetSetting(string key){return Assembly.GetExecutingAssembly().Location + ".config";}public static string GetSetting(string name, string defV){if (!Config.AppSettings.Settings.AllKeys.Contains(name)) return defV;return Config.AppSettings.Settings[name].Value;}public static string ModelConnString{get{return Config.ConnectionStrings.ConnectionStrings["DBSERP"].ConnectionString;}}public static string ConnString{get{return Config.ConnectionStrings.ConnectionStrings["ConnString"].ConnectionString;}}private static Configuration  Config{get{var _Config = HttpRuntime.Cache["_Config"] as Configuration;if (_Config == null ){var fileMap=new ExeConfigurationFileMap();fileMap.ExeConfigFilename = Assembly.GetExecutingAssembly().Location + ".config";_Config= ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);var fileCacheDep = new CacheDependency(fileMap.ExeConfigFilename);System.Web.HttpRuntime.Cache.Add("_Config", _Config, fileCacheDep, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.High, null);}return _Config;}}}
}