title: Error of calling .Net class through BizTalk orchestration
body: <p>I tried to call a .net class through BizTalk orchestration. But when I send the message to the BizTalk, it not really call the class instead got the following error. </p>
  
  <p>Can anyone help ?</p>
  
  <blockquote>
    <p>xlang/s engine event log entry: Failed while creating a BizTalk_Server_test.BizTalk_Orchestration_1 service. Exception type: ServiceCreationException The following is a stack trace that identifies the location where the exception occured at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession._serviceCreator(Guid&amp; instanceId, Object objCurrMsg) at Microsoft.XLANGs.Core.ResourceContainer._allocateResource(Guid&amp; key, UInt32 hashKey, ResourceCreator resCreator, Object creationContext) at Microsoft.XLANGs.Core.ResourceContainer.Dispense(Guid&amp; key, ResourceCreator resCreator, Object creationContext) at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession._dispenseService(Guid&amp; instanceId, IBTMessage currMsg) at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession._tryReceiveOneMessage(Boolean&amp; loggedError, Guid&amp; instanceId, IBTMessage currMsg) at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession._receiveOneMessage(Guid&amp; instanceId, Guid&amp; serviceId, IBTMessage currentMsg) at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession.ReceiveMessages(IBTMessage[] messages, Int32 firstIdx, Int32 count) at Microsoft.BizTalk.XLANGs.BTXEngine.AppDomains.AppDomainRoot.Microsoft.XLANGs.BizTalk.ProcessInterface.IAppDomainStub.ReceiveMessages(Object objMsg) at Microsoft.XLANGs.BizTalk.CrossProcess.AppDomainStubProxy.Microsoft.XLANGs.BizTalk.ProcessInterface.IAppDomainStub.ReceiveMessages(Object msgs) Additional error information: Could not load file or assembly 'BizTalk Server test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=56064b11c189a7aa' or one of its dependencies. The system cannot find the file specified. Exception type: FileNotFoundException Source: mscorlib Target Site: Void GetTypeByName(System.String, Boolean, Boolean, Boolean, System.Runtime.CompilerServices.StackCrawlMarkHandle, Boolean, System.Runtime.CompilerServices.ObjectHandleOnStack) The following is a stack trace that identifies the location where the exception occured at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, Boolean loadTypeFromPartialName, ObjectHandleOnStack type) at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark&amp; stackMark, Boolean loadTypeFromPartialName) at System.RuntimeType.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark&amp; stackMark) at System.Type.GetType(String typeName, Boolean throwOnError) at Microsoft.BizTalk.XLANGs.BTXEngine.BTXServiceStaticState.Resolve() at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession._createNewService(Guid&amp; serviceId, Guid&amp; instanceId, BTXServiceStaticState staticState) at Microsoft.BizTalk.XLANGs.BTXEngine.BTXSession._createOrRehydrateRealService(Guid&amp; instanceId, IBTMessage currMsg)  </p>
  </blockquote>