得到AppSettings中的配置字符串信息

/// <summary>
/// 得到AppSettings中的配置字符串信息
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static string GetConfigString(string key)
{
string CacheKey = "AppSettings-" + key;
object objModel = DataCache.GetCache(CacheKey);
if (objModel == null)
{
try
{
objModel = ConfigurationManager.AppSettings[key];
if (objModel != null)
{
DataCache.SetCache(CacheKey, objModel, DateTime.Now.AddMinutes(180), TimeSpan.Zero);
}
}
catch
{ }
}
return objModel.ToString();
}

string conn=GetConfigString("connection")

using System.Configuration;