使用config自定义配置

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public class OrdersSection : ConfigurationSection
	{
		[ConfigurationProperty("companyID", IsRequired = true)]
		public string CompanyID
		{
			get
			{
				return (string)base["companyID"];
			}
			set
			{
				base["companyID"] = value;
			}
		}
 
		[ConfigurationProperty("", IsDefaultCollection = true)]
		public OrderElementCollection Orders
		{
			get
			{
				return (OrderElementCollection)base[""];
			}
		}
	}
	public class OrderElementCollection : ConfigurationElementCollection
	{
		protected override ConfigurationElement CreateNewElement()
		{
			return new OrderElement();
		}
 
		protected override object GetElementKey(ConfigurationElement element)
		{
			return ((OrderElement)element).Number;
		}
 
		public override ConfigurationElementCollectionType CollectionType
		{
			get
			{
				return ConfigurationElementCollectionType.BasicMap;
			}
		}
 
		protected override string ElementName
		{
			get
			{
				return "order";
			}
		}
 
		public OrderElement this[int index]
		{
			get
			{
				return (OrderElement)BaseGet(index);
			}
			set
			{
				if (BaseGet(index) != null)
				{
					BaseRemoveAt(index);
				}
				BaseAdd(index, value);
			}
		}
	}
	public class OrderElement : ConfigurationElement
	{
		[ConfigurationProperty("number", IsRequired = true)]
		public string Number
		{
			get
			{
				return (string)base["number"];
			}
			set
			{
				base["number"] = value;
			}
		}
 
		[ConfigurationProperty("amount", IsRequired = true)]
		public double Amount
		{
			get
			{
				return (double)base["amount"];
			}
			set
			{
				base["amount"] = value;
			}
		}
 
		[ConfigurationProperty("lineItems", IsDefaultCollection = true)]
		public LineItemElementCollection LineItems
		{
			get
			{
				return (LineItemElementCollection)base["lineItems"];
			}
		}
	}
	public class LineItemElementCollection : ConfigurationElementCollection
	{
		[ConfigurationProperty("warehouseNumber", IsRequired = true)]
		public string WarehouseNumber
		{
			get
			{
				return (string)base["warehouseNumber"];
			}
			set
			{
				base["warehouseNumber"] = value;
			}
		}
		protected override ConfigurationElement CreateNewElement()
		{
			return new LineItemElement();
		}
 
		protected override object GetElementKey(ConfigurationElement element)
		{
			return ((LineItemElement)element).Number;
		}
 
		public override ConfigurationElementCollectionType CollectionType
		{
			get
			{
				return ConfigurationElementCollectionType.BasicMap;
			}
		}
 
		protected override string ElementName
		{
			get
			{
				return "lineItem";
			}
		}
 
		public LineItemElement this[int index]
		{
			get
			{
				return (LineItemElement)BaseGet(index);
			}
			set
			{
				if (BaseGet(index) != null)
				{
					BaseRemoveAt(index);
				}
				BaseAdd(index, value);
			}
		}
	}
	public class LineItemElement : ConfigurationElement
	{
		[ConfigurationProperty("number", IsKey = true, IsRequired = true)]
		public string Number
		{
			get
			{
				return (string)base["number"];
			}
			set
			{
				base["number"] = value;
			}
		}
 
		[ConfigurationProperty("description", IsRequired = true)]
		public string Description
		{
			get
			{
				return (string)base["description"];
			}
			set
			{
				base["description"] = value;
			}
		}
	}
 
	public class ConfigSection : ConfigurationSection
	{
		public ConfigSection()
		{
			//
			// TODO: 在此处添加构造函数逻辑
			//
		}
		[ConfigurationProperty("user", DefaultValue = "yanghong", IsRequired = true)]
		public string User
		{
			get { return (string)this["user"]; }
			set { this["user"] = value; }
		}
 
		[ConfigurationProperty("password", DefaultValue = "password", IsRequired = true)]
		public string PassWord
		{
			get { return (string)this["password"]; }
			set { this["password"] = value; }
		}
 
		[ConfigurationProperty("element")]
		public elementinfo Element
		{
			get { return (elementinfo)this["element"]; }
			set { this["element"] = value; }
		}
	}
	public class elementinfo : ConfigurationElement
	{
		public elementinfo() { }
 
		[ConfigurationProperty("element1", DefaultValue = "element1", IsRequired = true)]
		public string Element1
		{
			get { return (string)this["element1"]; }
		}
 
		[ConfigurationProperty("element2", DefaultValue = "element2", IsRequired = true)]
		public string Element2
		{
			get { return (string)this["element2"]; }
		}
	}

<configSections>
		<section name="orders" type="ConsoleApplication1.OrdersSection, ConsoleApplication1"/>
		<sectionGroup name="mygroup">
			<section name="mysection"
							 type="ConsoleApplication1.ConfigSection, ConsoleApplication1"
							  allowDefinition="Everywhere"
							   allowLocation="true"/>
		</sectionGroup>
	</configSections>

<orders companyID="2001">
		<order number="100001" amount="222.22">
			<lineItems warehouseNumber="02">
				<lineItem number="00-000-001" description="wii"/>
			</lineItems>
		</order>
		<order number="300001" amount="33.33">
			<lineItems warehouseNumber="99">
				<lineItem number="00-000-001" description="xbox 360"/>
				<lineItem number="00-000-003" description="playstation 3"/>
			</lineItems>
		</order>
	</orders>
	<mygroup>
		<mysection  user="用户" password="密码">
			<element element1="属性1" element2="属性2"></element>
		</mysection>
	</mygroup>

			OrdersSection section = ConfigurationManager.GetSection("orders") as OrdersSection;
			ConfigSection config = (ConfigSection)ConfigurationManager.GetSection("mygroup/mysection");

使用config自定义配置

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原文地址：http://www.cnblogs.com/ziranquliu/p/4702728.html