3.定义转换器   public class AssemblyQualifiedTypeNameConverter : ConfigurationConverterBase    {        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)        {            string typeName = (string)value;            if (string.IsNullOrEmpty(typeName))            {                return null;            }            Type result = Type.GetType(typeName, false);            if (result == null)            {                throw new ArgumentException(string.Format("不能加载类型\"{0}\"", typeName));            }            return result;        }        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)        {            Type type = value as Type;            if (null == type)            {                throw new ArgumentNullException("value");            }            return type.AssemblyQualifiedName;        }    }4.配置元素集合的元素类型的配置 public class ServiceTypeElement : ConfigurationElement    {        [ConfigurationProperty("type", IsRequired = true)]        [TypeConverter(typeof(AssemblyQualifiedTypeNameConverter))]        public Type ServiceType        {            get { return (Type)this["type"]; }            set { this["type"] = value; }        }    }5.定义配置元素集合    public class ServiceTypeElementCollection : ConfigurationElementCollection    {        protected override ConfigurationElement CreateNewElement()        {            return new ServiceTypeElement();        }        protected override object GetElementKey(ConfigurationElement element)        {            ServiceTypeElement serviceTypeElement = (ServiceTypeElement)element;            return serviceTypeElement.ServiceType.MetadataToken;        }    }6.自定义节对应的类的定义 public class BatchingHostingSettings : ConfigurationSection    {        [ConfigurationProperty("", IsDefaultCollection = true)]        public ServiceTypeElementCollection ServiceTypes        {            get { return (ServiceTypeElementCollection)this[""]; }        }        public static BatchingHostingSettings GetSection()        {            return ConfigurationManager.GetSection("CustomSection")                        as BatchingHostingSettings;        }    }7. 对应要解析的类 public class FooService    {    }    public class BarService    {    }    public class BazService    {    }8.ServiceHostCollection public class ServiceHostCollection : Collection
     
      , IDisposable    {        public ServiceHostCollection(params Type[] serviceTypes)        {            BatchingHostingSettings settings = BatchingHostingSettings.GetSection();            foreach (ServiceTypeElement element in settings.ServiceTypes)            {                this.Add(element.ServiceType);            }            if (null != serviceTypes)            {                Array.ForEach
      
       (serviceTypes, serviceType => this.Add(new ServiceHost(serviceType)));            }        }        public void Add(params Type[] serviceTypes)        {            if (null != serviceTypes)            {                Array.ForEach
       
        (serviceTypes, serviceType => this.Add(new ServiceHost(serviceType)));            }        }        public void Open()        {            foreach (ServiceHost host in this)            {                host.Open();            }        }        public void Dispose()        {            foreach (IDisposable host in this)            {                host.Dispose();            }        }    }9.演示一个服务寄宿的例子 protected void Page_Load(object sender, EventArgs e)        {            ServiceHostCollection list = new ServiceHostCollection();            foreach (ServiceHost host in list)            {                host.Opened += (sender1, arg1) =>                {                 System.Diagnostics.Debug.WriteLine("服务{0}开始监听",               (sender1 as ServiceHost).Description.ServiceType);                };            }            list.Open();            Console.Read();        }