using ?System;
using ?System.Data;
using ?System.Configuration;
using ?System.Linq;
using ?System.Web;
using ?System.Web.Security;
using ?System.Web.UI;
using ?System.Web.UI.HtmlControls;
using ?System.Web.UI.WebControls;
using ?System.Web.UI.WebControls.WebParts;
using ?System.Xml.Linq;

/// ? <summary>
/// ?Summary?description?for?MyElement
/// ? </summary>
public ? class ?MyElement?:?ConfigurationElement
{
???? public ?MyElement()
????{
???????? //
???????? // ?TODO:?Add?constructor?logic?here
???????? //
????}
????[ConfigurationProperty( " userName " ,IsRequired = true )]
???? public ? string ?UserName
????{
???????? get ?{? return ?( string ) this [ " userName " ];?}
???????? set ?{? this [ " userName " ]? = ?value;?}
????}
????[ConfigurationProperty( " userPwd " )]
???? public ? string ?UserPwd
????{
???????? get ?{? return ?( string ) this [ " userPwd " ];?}
???????? set ?{? this [ " userPwd " ]? = ?value;?}
????}
}
public ? class ?MyElementCollection?:?ConfigurationElementCollection
{
????
???? public ?MyElementCollection()
????{
????????MyElement?element? = ?CreateNewElement()? as ?MyElement;
????}
???? protected ? override ?ConfigurationElement?CreateNewElement()
????{
???????? return ? new ?MyElement();
????}

???? protected ? override ? object ?GetElementKey(ConfigurationElement?element)
????{
???????? return ?((MyElement)element).UserName;
????}
???? protected ? override ? void ?BaseAdd(ConfigurationElement?element)
????{
???????? base .BaseAdd(element, false );
????}
???? public ? void ?Add(MyElement?element)
????{
????????BaseAdd(element);
????}
}
public ? class ?MyConfigSection?:?ConfigurationSection
{
????
????????MyElement?element;

???????? public ?MyConfigSection()
????????{
????????????element? = ? new ?MyElement();
????????}

????????[ConfigurationProperty( " files " )]
???????? public ?MyElementCollection?FileTypes
????????{
???????????? get
????????????{
????????????????MyElementCollection?types? = ?(MyElementCollection) base [ " files " ];
???????????????? return ?types;
????????????}
????????}

???????? protected ? override ? void ?DeserializeSection(System.Xml.XmlReader?reader)
????????{
???????????? base .DeserializeSection(reader);
????????}

???????? protected ? override ? string ?SerializeSection(ConfigurationElement?parentElement,? string ?name,?ConfigurationSaveMode?saveMode)
????????{
???????????? return ? base .SerializeSection(parentElement,?name,?saveMode);
????????}

}

???? < section? name ="MyConfigS" ?type ="MyConfigSection" />
</ configSections >

???? protected ? void ?Button1_Click( object ?sender,?EventArgs?e)
????{
????????Configuration?config? = ?WebConfigurationManager.OpenWebConfiguration( " ~ " );
????????MyConfigSection?files? = ?config.Sections[ " MyConfigS " ]? as ?MyConfigSection;
????????MyElement?obj? = ? new ?MyElement();
????????obj.UserName? = ? " sdf " ;
????????obj.UserPwd? = ? " sdf " ;
????????files.FileTypes.Add(obj);
????????config.Save();
????}