解决这个问题花了一些时间，结论很有趣。
我们的 Office (Word/Excel/PowerPoint) 加载项向我们的自定义 WCF 服务发送请求，托管 Office 应用程序终止，并在应用程序日志中留下此条目：
Provider: .NET Runtime
EventID: 1023
Level: 2
Task: 0
Keywords: 0x80000000000000
Channel: Application
EventData: .NET Runtime version 2.0.50727.4200 - Fatal Execution Engine Error (6BC47B3E) (80131506)
要重现这一点，请在 Visual Studio 2008 中创建一个新的“Word 2007 加载项”项目。添加对 System.ServiceModel 和 System.Runtime.Serialization 的引用。修改您的 ThisAddin 类以包含此代码，我认为这是重现此行为所需的最少代码：
[Serializable]
public class CustomQuery { }
[Serializable]
public class CustomQueryCollection : ReadOnlyCollection<CustomQuery>
{
public CustomQueryCollection(IEnumerable<CustomQuery> queries)
: base(queries.ToArray())
{ }
}
[Serializable]
[KnownType(typeof(CustomQueryCollection))]
public class CustomRequest : ISerializable
{
readonly CustomQueryCollection _collection;
public CustomRequest(IEnumerable<CustomQuery> queries)
{
_collection = new CustomQueryCollection(queries);
}
protected CustomRequest(SerializationInfo info, StreamingContext context)
{
_collection = (CustomQueryCollection)info.GetValue("Queries", typeof(CustomQueryCollection));
}
public CustomQueryCollection Queries { get { return _collection; } }
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("Queries", _collection);
}
}
[ServiceContract]
public interface ICustomService
{
[OperationContract]
void SendRequest(CustomRequest request);
}
[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
public class CustomService : ICustomService
{
public void SendRequest(CustomRequest request)
{
// this line is never reached.
}
}
public class CustomClient : ClientBase<ICustomService>, ICustomService
{
public CustomClient(Binding binding, EndpointAddress address)
: base(binding, address)
{ }
public void SendRequest(CustomRequest request)
{
Channel.SendRequest(request);
}
}
public partial class ThisAddIn
{
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
var address = "net.pipe://localhost/kamikaze";
var endpointAddress = new EndpointAddress(address);
var binding = new NetNamedPipeBinding();
using (var serviceHost = new ServiceHost(new CustomService()))
using (var client = new CustomClient(binding, endpointAddress))
{
serviceHost.AddServiceEndpoint(typeof(ICustomService), binding, address);
serviceHost.Open();
client.SendRequest(new CustomRequest(new CustomQuery[0]));
// this line is never reached.
serivceHost.Close();
}
}
private void ThisAddIn_Shutdown(object sender, System.EventArgs e) { }
#region VSTO generated code
private void InternalStartup()
{
this.Startup += new System.EventHandler(ThisAddIn_Startup);
this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
}
#endregion
}
点击 [F5]：Word 2007 启动，然后消失，将上述日志消息留在系统的应用程序日志中。相同的代码在我们尝试过的所有其他上下文中都可以正常工作。