public static class CustomerConfigHelper
{
public static object _lockObject = new object();

private static string GetCustomConfigValue(string key)
{
string configFilePath = "~/Config/CustomConfig.config";
string configElementsName = "Add";
string configAttributeKeyName = "Key";
string configAttributeValueName = "Value";

return GetValue(key,configFilePath, configElementsName, configAttributeKeyName,configAttributeValueName);
}

private static string GetValue(string key,string configFilePath)
{
string configElementsName = "Add";
string configAttributeKeyName = "Key";
string configAttributeValueName = "Value";

return GetValue(key,configFilePath, configElementsName, configAttributeKeyName,configAttributeValueName);
}

private static string GetValue(string key, string configFilePath, string configElementsName, string configAttributeKeyName,string configAttributeValueName)
{
string _value = string.Empty;

string _path = HttpContext.Current.Server.MapPath(configFilePath);

XElement _element = XElement.Load(_path);
var _config = from config in _element.Elements(configElementsName) select config;

Dictionary<string, string> _dic = _config.ToDictionary(k => k.Attribute(configAttributeKeyName).Value, k => k.Attribute(configAttributeValueName).Value);

_dic.TryGetValue(key, out _value);
return _value;
}

/// <summary>
/// 获取自定义文件配置节点值:整形
/// </summary>
/// <param name="key">配置节点KEY</param>
/// <returns></returns>
public static int GetCustomConfigInt(string key)
{
return TypeHelper.ToInt(GetCustomConfigValue(key));
}
/// <summary>
/// 获取自定义文件配置节点值:整形
/// </summary>
/// <param name="key"></param>
/// <param name="configFilePath"></param>
/// <returns></returns>
public static int GetCustomConfigInt(string key, string configFilePath)
{
return TypeHelper.ToInt(GetValue(key, configFilePath));
}

/// <summary>
/// 获取自定义文件配置节点值:长整形
/// </summary>
/// <param name="key">配置节点KEY</param>
/// <returns></returns>
public static long GetCustomConfigLong(string key)
{
return TypeHelper.ToInt64(GetCustomConfigValue(key));
}
/// <summary>
/// 获取自定义文件配置节点值:长整形
/// </summary>
/// <param name="key"></param>
/// <param name="configFilePath"></param>
/// <returns></returns>
public static long GetCustomConfigLong(string key, string configFilePath)
{
return TypeHelper.ToInt64(GetValue(key, configFilePath));
}

/// <summary>
/// 获取自定义文件配置节点值:字符串
/// </summary>
/// <param name="key">配置节点KEY</param>
/// <returns></returns>
public static string GetCustomConfigString(string key)
{
return GetCustomConfigValue(key);
}
/// <summary>
/// 获取自定义文件配置节点值:字符串
/// </summary>
/// <param name="key"></param>
/// <param name="configFilePath"></param>
/// <returns></returns>
public static string GetCustomConfigString(string key, string configFilePath)
{
return GetValue(key, configFilePath);
}

}

<?xml version="1.0" encoding="utf-8" ?>
<customconfig>

<!--分页页码大小-->
<Add Key="PageSize" Value="10"></Add>
<!--图片路径-->
<Add Key="ImagesWebPath" Value="http://xxx.xx.xxx.xxx:9000"></Add>

</customconfig>