WCF DataServices(CTP2):客户端和服务之间存在类型不匹配

我使用的是带有实体框架4.1的WCF数据服务CTP2。现在，我正试图通过我的数据上下文获取任何数据，我得到了这个异常：

System.Reflection.TargetInvocationException：已由引发异常调用的目标。--->System.InvalidOperationException：在客户端和服务。类型"Crm.Objects.Segmentation"不是实体类型，但响应有效载荷表示一个实体类型请确保已定义类型关于客户端匹配的数据模型服务，或更新服务客户的参考在System.Data.Services.Client.AtomMaterializer.MaterializeResolvedEntry（AtomEntry条目，布尔includeLinks）System.Data.Services.Client.AtomMaterializer.Materialize（AtomEntryentry，预期类型EntryType，布尔值includeLinks）System.Data.Services.Client.AtomMaterializer.DirectMaterializePlan（AtomMaterializer物化器，AtomEntry条目，类型expectedEntryType）System.Data.Services.Client.AtomMaterializerInvoker.DirectMaterializePlan（对象物化器，对象条目，类型expectedEntryType）System.Data.Services.Client.ProjectionPlan.Run（AtomMaterializer物化器，AtomEntry条目，类型expectedType）System.Data.Services.Client.AtomMaterializer.Read（）在System.Data.Services.Client.MaterializeAtom.MoveNextInternal（）在System.Data.Services.Client.MaterializeAtom.MoveNext（）在System.Linq.Enumerable.d_b1 1.MoveNext() at System.Collections.Generic.List 1..ctor（IEnumerable 1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable 1来源）MangoCrm.Modules.ReplicaBuilder.GetItems[T]（IEnumerable`1查询）MangoCrm.Modules.Replication。ReplicaBuilder.BeginReplication（）在MangoCrm.Modules.ReplicationWindowControl.b_0（）---内部异常堆栈跟踪结束---在System.RuntimeMethodHandle_InvokeMethodFast（IRuntimeMethodInfo方法，Object target，Object[]自变量，SignatureStruct&sig，MethodAttributes MethodAttributes，RuntimeType typeOwner）System.RuntimeMethodHandle.IInvokeMethodFast（IRuntimeMethodInfo方法，Object target，Object[]arguments，Signature sig，MethodAttributes MethodAttributes，RuntimeType typeOwner）System.Reflection.RuntimeMethodInfo.IInvoke（对象obj，BindingFlags invokeAttr，Binderbinder，Object[]参数，CultureInfo区域性，布尔skipVisibilityChecks）System.Delegate.DynamicInvokeImpl（Object[]args）System.Windows.Threading.ExceptionWrapper.InternalRealCall（委托callback，Object args，Int32 numArgs）在MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen（对象source，Delegate方法，Object参数，Int32 numArgs，Delegate catchHandler）

这是我的代码：

            var uri = new Uri(webServiceUrl);
            var service = new DataServiceContext(uri);
            MessageBox.Show(service.CreateQuery<Segmentation>("DbSegmentations").ToList().Count.ToString());

有什么帮助吗？

更新好的，现在我发现我的WCF响应包含一个修改过的实体对象。这是：

<?xml version="1.0" encoding="iso-8859-1" standalone="yes"?>
<entry xml:base="http://localhost:99/Services/CrmDataService.svc/"
       xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices"
       xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"
       xmlns="http://www.w3.org/2005/Atom">
  <id>http://localhost:99/Services/CrmDataService.svc/DbSegmentations(guid'e9854210-85d1-4822-ba70-7e1d3d29cf62')</id>
  <title type="text"></title>
  <updated>2011-06-16T15:07:48Z</updated>
  <author>
    <name />
  </author>
  <link rel="edit" title="Segmentation" href="DbSegmentations(guid'e9854210-85d1-4822-ba70-7e1d3d29cf62')" />
  <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Companies"
        type="application/atom+xml;type=feed"
        title="Companies"
        href="DbSegmentations(guid'e9854210-85d1-4822-ba70-7e1d3d29cf62')/Companies" />
  <category term="Crm.Data.Segmentation" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
  <content type="application/xml">
    <m:properties>
      <d:Id m:type="Edm.Guid">e9854210-85d1-4822-ba70-7e1d3d29cf62</d:Id>
      <d:Name>Promoter</d:Name>
      <d:Description m:null="true" />
      <d:ReplicaInfo m:type="Crm.Data.ReplicaInfo">
        <d:CreateDate m:type="Edm.DateTime">2011-06-09T20:35:22.29</d:CreateDate>
        <d:ModifyDate m:type="Edm.DateTime">2011-06-09T20:35:22.29</d:ModifyDate>
        <d:CreatedById m:type="Edm.Guid">00000000-0000-0000-0000-000000000000</d:CreatedById>
        <d:ModifiedById m:type="Edm.Guid">00000000-0000-0000-0000-000000000000</d:ModifiedById>
        <d:IsDeleted m:type="Edm.Boolean">false</d:IsDeleted>
      </d:ReplicaInfo>
    </m:properties>
  </content>
</entry>

出现问题

 <category
 term="Crm.Data.Segmentation"
 scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme"
 />

所以问题是为什么我的Crm.Objects.Segmentation变成了Crm.Data.Segmentation？怎么把它改回来？

更新2我认为问题出在我的数据环境中。数据上下文有一个名称空间Crm.data。我的实体在Crm.Objects中。然后我使用4.0.0 WCF，一切都很好，但后来我切换到CTP2，我的实体得到了Crm.data名称空间，而不是正确的Crm.Objects

internal class CustomDataServiceContext : DataServiceContext
{
    public CustomDataServiceContext(Uri serviceRoot)
    : base(serviceRoot, DataServiceProtocolVersion.V3)
    {
        this.ResolveName = ResolveNameFromType;
        this.ResolveType = ResolveTypeFromName;
    }
    protected string ResolveNameFromType(Type clientType)
    {
        if (clientType.Namespace.Equals("ODataClient.MSProducts", StringComparison.Ordinal))
        {
            return string.Concat("ODataService.Models.", clientType.Name);
        }
        return clientType.FullName;
    }
    protected Type ResolveTypeFromName(string typeName)
    {
        if (typeName.StartsWith("ODataService.Models", StringComparison.Ordinal))
        {
            return this.GetType().Assembly.GetType(string.Concat("ODataClient.MSProducts", typeName.Substring(19)), false);
        }
        return null;
    }
}

private static ClientTypeUtil.KeyKind IsKeyProperty(PropertyInfo propertyInfo, DataServiceKeyAttribute dataServiceKeyAttribute)
{
  string name1 = propertyInfo.Name;
  ClientTypeUtil.KeyKind keyKind = ClientTypeUtil.KeyKind.NotKey;
  if (dataServiceKeyAttribute != null && dataServiceKeyAttribute.KeyNames.Contains(name1))
    keyKind = ClientTypeUtil.KeyKind.AttributedKey;
  else if (name1.EndsWith("ID", StringComparison.Ordinal))
  {
    string name2 = propertyInfo.DeclaringType.Name;
    if (name1.Length == name2.Length + 2 && name1.StartsWith(name2, StringComparison.Ordinal))
      keyKind = ClientTypeUtil.KeyKind.TypeNameId;
    else if (2 == name1.Length)
      keyKind = ClientTypeUtil.KeyKind.Id;
  }
  return keyKind;
}

    protected override DataServiceContext CreateDataSource()
    {
        var db = base.CreateDataSource();
        db.Configuration.ProxyCreationEnabled = false;
        return db;
    }