<?xml version="1.0" encoding="utf-8" ?>
<configuration><configSections><section name="deviceFieldConfig" type="ConfigurationSectionDemo.DeviceFieldonfig,ConfigurationSectionDemo" /></configSections><startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" /></startup><deviceFieldConfig deviceCode = "BC2D00"><fields><!--2D 水平补偿--><add fieldName="BCSP2D" fieldId="10032"/><!--2D 垂直补偿--><add fieldName="BCCZ2D" fieldId="10033"/><!--2D 倾角补偿--><add fieldName="BCQJ2D" fieldId="10034"/><!--2D 外轨超高--><add fieldName ="BCWG2D" fieldId="10035"/><!--检测时间--><add fieldName ="JCJCSJ" fieldId="10065"/></fields></deviceFieldConfig></configuration>

//使用自定义节点，可能会涉及到这几个对象的使用：//ConfigurationSection【配置域】、//    ConfigurationElement【节点】、//    ConfigurationElementCollection【节点列表】public class DeviceFieldonfig : ConfigurationSection{[ConfigurationProperty("deviceCode", IsRequired = true)]public string DeviceCode { get { return (string)base["deviceCode"]; } set { base["deviceCode"] = value; } }[ConfigurationProperty("fields", IsDefaultCollection =false )]public FiledCollection Fileds { get { return (FiledCollection)this["fields"]; } set { base["fields"] = value; } }}public class FiledCollection : ConfigurationElementCollection{protected override ConfigurationElement CreateNewElement(){return new FieldElement();}protected override object GetElementKey(ConfigurationElement element){FieldElement fieldElement = element as FieldElement;return fieldElement?.FieldName;}//public override ConfigurationElementCollectionType CollectionType//{//    get//    {//        return ConfigurationElementCollectionType.BasicMap;//    }//}public FieldElement this[int index]{get { return (FieldElement)BaseGet(index); }set{if (BaseGet(index) != null){BaseRemoveAt(index);}BaseAdd(index, value);}}public new  string this[string key]{get { return ((FieldElement)base.BaseGet(key)).FieldId; }}}public class FieldElement : ConfigurationElement{/// <summary>/// IsRequired  获取或设置一个值，指示经过修饰的元素属性是否是必需的/// IsKey 如果此属性是该集合中元素的 Key 属性，则为 true；否则为 false。 默认值为 false。/// </summary>[ConfigurationProperty("fieldName", IsRequired = true, IsKey = true)]public string FieldName { get { return (string)base["fieldName"]; } set { base["fieldName"] = value; } }[ConfigurationProperty("fieldId", IsRequired = true)]public string FieldId { get { return (string)base["fieldId"]; } set { base["fieldId"] = value; } }}

 DeviceFieldonfig d = (DeviceFieldonfig)System.Configuration.ConfigurationManager.GetSection("deviceFieldConfig");string content = d.Fileds["BCSP2D"];