通过远程处理传递类型化数据集时获取System.Security.SecurityException。谁能告诉我为什么？

Question

将生产项目从.net 2.0升级到4.0后，我收到了System.Security.SecurityException。我可以传递基类型，例如通用数据集，就好了。但是，对于特定类型的数据集（XSD），我得到：

System.Reflection.TargetInvocationException occurred
  HResult=-2146232828
  Message=Exception has been thrown by the target of an invocation.
  Source=mscorlib
  StackTrace:
    Server stack trace: 
       at System.RuntimeMethodHandle.SerializationInvoke(IRuntimeMethodInfo method, Object target, SerializationInfo info, StreamingContext& context)
       at System.Runtime.Serialization.ObjectManager.CompleteISerializableObject(Object obj, SerializationInfo info, StreamingContext context)
       at System.Runtime.Serialization.ObjectManager.FixupSpecialObject(ObjectHolder holder)
       at System.Runtime.Serialization.ObjectManager.DoFixups()
       at System.Runtime.Serialization.Formatters.Soap.ObjectReader.Deserialize(HeaderHandler handler, ISerParser serParser)
       at System.Runtime.Serialization.Formatters.Soap.SoapFormatter.Deserialize(Stream serializationStream, HeaderHandler handler)
       at System.Runtime.Remoting.Channels.CoreChannel.DeserializeSoapRequestMessage(Stream inputStream, Header[] h, Boolean bStrictBinding, TypeFilterLevel securityLevel)
       at System.Runtime.Remoting.Channels.SoapServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream)
    Exception rethrown at [0]: 
       at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
       at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
       at DataBridgeWS.Admin.SaveJobData(DataSet jobds)
       at IEDataBridge.Main.SaveJob() in C:\Source\IED\3.2\IEDataBridge\Main.vb:line 2733
  InnerException: System.Security.SecurityException
       GrantedSet=""
       HResult=-2146233078
       Message=Request failed.
       PermissionState=<PermissionSet class="System.Security.PermissionSet"
version="1"
Unrestricted="true"/>

       RefusedSet=""
       Source=mscorlib
       Url=""
       StackTrace:
            at System.Array.InternalCreate(Void* elementType, Int32 rank, Int32* pLengths, Int32* pLowerBounds)
            at System.Array.CreateInstance(Type elementType, Int32 length)
            at System.Data.DataTable.NewRowArray(Int32 size)
            at System.Data.Index.GetRows(Range range)
            at System.Data.DataColumn.IsNotAllowDBNullViolated()
            at System.Data.DataSet.EnableConstraints()
            at System.Data.DataSet.set_EnforceConstraints(Boolean value)
            at System.Data.Merger.MergeDataSet(DataSet source)
            at System.Data.DataSet.Merge(DataSet dataSet, Boolean preserveChanges, MissingSchemaAction missingSchemaAction)
            at DataBridgeJobs.JobData..ctor(SerializationInfo info, StreamingContext context) in C:\Source\IED\3.2\DataBridgeJobs\JobData.Designer.vb:line 280

       InnerException: 

显然，.net 4安全性的变化导致了这个问题 - 但经过大量搜索和尝试不同的方法之后，我有点卡住了。除非绝对必要，否则我不想转移到WCF - 这是遗留产品。

我正在通过.config文件使用声明性设置。客户端和服务器都有：

此应用程序在Intranet上运行，后端托管在IIS中。所以它可以（并且是）一个完整的信任应用程序。）

以下是客户端exe.config的相关部分：

  <system.runtime.remoting>
    <application>
      <channels>
        <channel ref="http">
          <serverProviders>
            <formatter ref="binary" typeFilterLevel="Full"/>
          </serverProviders>
        </channel>
      </channels>
    </application>
  </system.runtime.remoting>

这是服务器的web.config：

  <system.runtime.remoting>
    <application>
         <channels>
            <channel ref="http" machineName="localhost">
               <clientProviders>
                  <formatter ref="binary" typeFilterLevel="Full"/>
               </clientProviders>
            </channel>
         </channels>
        <service>
            <wellknown mode="SingleCall" type="DataBridgeWS.Admin, DataBridgeWS" objectUri="Admin.rem" />
            <wellknown mode="SingleCall" type="DataBridgeWS.IEVData, DataBridgeWS" objectUri="IEVData.rem" />
        </service>
    </application>
  </system.runtime.remoting>

任何指针都将非常感谢！