Asp.net mvc 使用MVC4 Web API的Nhibernate中的XML序列化错误

您好，我们正在使用NHibernate在MVC4中创建一个web API。但是当我们调用web API时，它会抛出错误。这里是错误

<Error><Message>An error has occurred.</Message><ExceptionMessage>The 'ObjectContent`1' type failed to serialize the response body for content type 'application/xml; charset=utf-8'.</ExceptionMessage><ExceptionType>System.InvalidOperationException</ExceptionType><StackTrace/><InnerException><Message>An error has occurred.</Message><ExceptionMessage>Type 'NHibernate.Collection.Generic.PersistentGenericSet`1[[MvcAngular.Models.BankAccount, MvcAngular, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' with data contract name 'ArrayOfBankAccount:http://schemas.datacontract.org/2004/07/MvcAngular.Models' is not expected. Consider using a DataContractResolver or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.</ExceptionMessage><ExceptionType>System.Runtime.Serialization.SerializationException</ExceptionType><StackTrace>   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeAndVerifyType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, Boolean verifyKnownType, RuntimeTypeHandle declaredTypeHandle, Type declaredType)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithXsiType(XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle objectTypeHandle, Type objectType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle, Type declaredType)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialize(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerializeReference(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle)
   at WriteCustomerInfoToXml(XmlWriterDelegator , Object , XmlObjectSerializerWriteContext , ClassDataContract )
   at System.Runtime.Serialization.ClassDataContract.WriteXmlValue(XmlWriterDelegator xmlWriter, Object obj, XmlObjectSerializerWriteContext context)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithoutXsiType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialize(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerializeReference(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle)
   at WriteArrayOfCustomerInfoToXml(XmlWriterDelegator , Object , XmlObjectSerializerWriteContext , CollectionDataContract )
   at System.Runtime.Serialization.CollectionDataContract.WriteXmlValue(XmlWriterDelegator xmlWriter, Object obj, XmlObjectSerializerWriteContext context)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeAndVerifyType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, Boolean verifyKnownType, RuntimeTypeHandle declaredTypeHandle, Type declaredType)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithXsiTypeAtTopLevel(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle originalDeclaredTypeHandle, Type graphType)
   at System.Runtime.Serialization.DataContractSerializer.InternalWriteObjectContent(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.DataContractSerializer.InternalWriteObject(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph)
   at System.Runtime.Serialization.DataContractSerializer.WriteObject(XmlWriter writer, Object graph)
   at System.Net.Http.Formatting.XmlMediaTypeFormatter.<>c__DisplayClass7.<WriteToStreamAsync>b__6()
   at System.Threading.Tasks.TaskHelpers.RunSynchronously(Action action, CancellationToken token)</StackTrace></InnerException></Error>

发生错误。'ObjectContent'1'类型未能序列化内容类型'application/xml的响应正文；charset=utf-8'.System.InvalidOperationException发生错误。使用数据协定名称“ArrayOfBankAccount:http://schemas.datacontract.org/2004/07/MvcAngular.Models”他说。考虑使用DATACONTRORTCORDEVER或将未知类型的任何类型添加到已知类型的列表中，例如，通过使用KnownTypeAttribute属性或将它们添加到传递给DataContractSerializer.System.Runtime.Serialization.Serialization的已知类型列表中，在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializationAndVerifyType中出现SerializationException（DataContract DataContract、XmlWriterDelegator xmlWriter、对象obj、布尔verifyKnownType、运行时类型句柄declaredTypeHandle、类型declaredType） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithXsiType（XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle objectTypeHandle，Type objectType，Int32 declaredTypeID，RuntimeTypeHandle declaredTypeHandle，Type declaredType） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialization（XmlWriterDelegator xmlWriter、Object obj、Boolean isDeclaredType、Boolean writeXsiType、Int32 declaredTypeID、RuntimeTypeHandle declaredTypeHandle） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerializationReference（XmlWriterDelegator xmlWriter、Object obj、Boolean isDeclaredType、Boolean writeXsiType、Int32 declaredTypeID、RuntimeTypeHandle declaredTypeHandle） 在WriteCustomerInfoToXml（XmlWriterDelegator、Object、XmlObjectSerializerWriteContext、ClassDataContract） at System.Runtime.Serialization.ClassDataContract.WriteXmlValue（XmlWriterDelegator xmlWriter、Object obj、XmlObjectSerializerWriteContext上下文） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue（DataContract DataContract，XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle declaredTypeHandle） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithoutXsiType（DataContract DataContract，XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle declaredTypeHandle） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialization（XmlWriterDelegator xmlWriter、Object obj、Boolean isDeclaredType、Boolean writeXsiType、Int32 declaredTypeID、RuntimeTypeHandle declaredTypeHandle） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerializationReference（XmlWriterDelegator xmlWriter、Object obj、Boolean isDeclaredType、Boolean writeXsiType、Int32 declaredTypeID、RuntimeTypeHandle declaredTypeHandle） 在客户InfoToXML（XmlWriterDelegator、Object、XmlObjectSerializerWriteContext、CollectionDataContract）的WriteArayOfCustomerInfoToXML（XmlWriterDelegator、Object、XmlObjectSerializerWriteContext） 在System.Runtime.Serialization.CollectionDataContract.WriteXmlValue（XmlWriterDelegator xmlWriter、对象obj、XmlObjectSerializerWriteContext上下文） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue（DataContract DataContract，XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle declaredTypeHandle） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializationAndVerifyType（DataContract、XmlWriterDelegator、xmlWriter、Object obj、布尔verifyKnownType、RuntimeTypeHandle declaredTypeHandle、Type declaredType） 在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializationWithXSITypeAttoplevel（DataContract-DataContract、XmlWriterDelegator-xmlWriter、Object obj、RuntimeTypeHandle-OriginaldRecaredTypeHandle、Type graphType） 在System.Runtime.Serialization.DataContractSerializer.InternalWriteObjectContent（XmlWriterDelegator编写器、对象图、DataContractResolver DataContractResolver） 在System.Runtime.Serialization.DataContractSerializer.InternalWriteObject（XmlWriterDelegator编写器、对象图、DataContractResolver DataContractResolver） 在System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions（XmlWriterDelegator编写器、对象图、DataContractResolver DataContractResolver） 在System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions（XmlWriterDelegator编写器，对象图） at System.Runtime.Serialization.DataContractSerializer.WriteObject（XmlWriter编写器，对象图） 在System.Net.Http.Formatting.XmlMediaTypeFormatter.c__DisplayClass7.b__u6（）中 在System.Threading.Tasks.TaskHelpers.RunSynchronously（操作操作，取消令牌） 我们正在WebApi中成功地获得结果。这是类的模式。我们在父类中使用了ISET int

public class CustomerInfo
    {

        int _CustomerId;
        public virtual int CustomerId
        {
            get { return _CustomerId; }
            set { _CustomerId = value; }
        }

        string _Name;
        [Required]
        public virtual string Name
        {
            get { return _Name; }
            set { _Name = value; }
        }

        public virtual ISet<BankAccount> BankAccounts { get; set; }


        public virtual void SetBankAccount(ISet<BankAccount> bankact)
        {
            this.BankAccounts = bankact;
        }


        public virtual ISet<BankAccount> GetBankAccounts()
        {
            return this.BankAccounts;
        }

    }

公共类CustomerInfo
{
int_客户ID；
公共虚拟int客户ID
{
获取{return\u CustomerId；}
设置{u CustomerId=value；}
}
字符串\u名称；
[必需]
公共虚拟字符串名
{
获取{return\u Name；}
设置{u Name=value；}
}
公共虚拟ISet银行帐户{get；set；}
公共虚拟银行账户（ISet bankact）
{
this.BankAccounts=bankact；
}
公共虚拟ISet GetBankAccounts（）
{
归还此银行账户；
}
}

这就是webapi的Get方法

 public IList<CustomerInfo> Get()
        {
            CustomerInfoDAL cd = new CustomerInfoDAL();
            var lst = cd.GetCustomer();
            return lst;
        }

public IList Get（）
{
CustomerInfoDAL cd=新CustomerInfoDAL（）；
var lst=cd.GetCustomer（）；
返回lst；
}

我们正在成功地获得lst的结果。但是