.net2.0 配置节

< configuration >
     < configSections >
         < section  name ="indexusNetSharedCache"  type ="MergeSystem.Indexus.WinServiceCommon.Configuration.Client.IndexusProviderSection, MergeSystem.Indexus.WinServiceCommon"
              />
     </ configSections >
         
     < indexusNetSharedCache  defaultProvider ="IndexusSharedCacheProvider" >
         < servers >
             < add  key ="SrvZh03"   ipaddress ="192.168.212.21"  port ="48888"   />
             <!-- <add key="RoeePC"  ipaddress="10.0.0.15" port="48888" />
            <add key="MichaelPC"  ipaddress="10.0.0.53" port="48888" /> -->
         </ servers >
         < providers >
             < add
         name ="IndexusSharedCacheProvider"
        type ="MergeSystem.Indexus.WinServiceCommon.Provider.Cache.IndexusSharedCacheProvider, MergeSystem.Indexus.WinServiceCommon"
            >
             </ add >
         </ providers >
     </ indexusNetSharedCache >

 配置节 IndexusProviderSection ,其中 成员Servers和 Providers继承于System.Configuration.ConfigurationElementCollection， 而它聚合了System.Configuration.ConfigurationElement派生
ConfigurationElement的派生类包括了一序列的属性，这些属性可以定义默认值和限制取值范围

public   class  IndexusProviderSection : ConfigurationSection
     ... {      
        [ConfigurationProperty("providers")]
        public ProviderSettingsCollection Providers
        ...{
            get ...{ return (ProviderSettingsCollection)base["providers"]; }
        }

        
        [ConfigurationProperty("servers")]
        public IndexusServerSettingCollection Servers
        ...{
            get ...{ return (IndexusServerSettingCollection)this["servers"]; }
        }

        /**//// <summary>
        /// Gets or sets the default provider, min. 1 server has to be defined.
        /// </summary>
        /// <value>The default provider.</value>
        [StringValidator(MinLength = 1)]
        [ConfigurationProperty("defaultProvider", DefaultValue = "IndexusSharedCacheProvider")]
        public string DefaultProvider
        ...{
            get ...{ return (string)base["defaultProvider"]; }
            set ...{ base["defaultProvider"] = value; }
        }
    }

public   class  IndexusServerSettingCollection : System.Configuration.ConfigurationElementCollection
     ... {

        public IndexusServerSetting this[int index]
        ...{
            get
            ...{
                return base.BaseGet(index) as IndexusServerSetting;
            }
            set
            ...{
                if (base.BaseGet(index) != null)
                ...{
                    base.BaseRemoveAt(index);
                }
                this.BaseAdd(index, value);
            }
        }


        protected override System.Configuration.ConfigurationElement CreateNewElement()
        ...{
            return new IndexusServerSetting();
        }

        
        protected override object GetElementKey(System.Configuration.ConfigurationElement element)
        ...{
            return ((IndexusServerSetting)element).Key;
        }
    }

public   class  IndexusServerSetting : System.Configuration.ConfigurationElement
     ... {
    
        [System.Configuration.ConfigurationProperty("key", IsRequired = true)]
        public string Key
        ...{
            get
            ...{
                return this["key"] as string;
            }
        }

        
        protected override void InitializeDefault()
        ...{
            base.InitializeDefault();
        }
        
        [System.Configuration.ConfigurationProperty("ipaddress", IsRequired = true)]
        public string IpAddress
        ...{
            get
            ...{
                return this["ipaddress"] as string;
            }
        }
        
        [System.Configuration.ConfigurationProperty("port", IsRequired = false)]
        public string Port
        ...{
            get
            ...{
                return this["port"] as string;
            }
        }
    }

使用方法：

                 foreach  (COM.Configuration.Client.IndexusServerSetting server  in  IndexusDistributionCache.ProviderSection.Servers)
                 ... {
                    serverList.Add(server.IpAddress);
                }

providerCollection  =   new  IndexusProviderCollection();
                        ProvidersHelper.InstantiateProviders(
                                                                providerSection.Providers,
                                providerCollection,
                                 typeof (IndexusProviderBase)
                            );

                        providerBase  =  providerCollection[providerSection.DefaultProvider];

Provider介绍

.net 1.1的做法
http://blog.youkuaiyun.com/anghlq/archive/2006/09/17/1233175.aspx