组装。GetExportedTypes()不包括WCF服务

MetadataExchangeClient mexClient = new MetadataExchangeClient(metadataAddress);
mexClient.ResolveMetadataReferences = true;
MetadataSet metaDocs = mexClient.GetMetadata();

WsdlImporter importer = new WsdlImporter(metaDocs);
ServiceContractGenerator generator = new ServiceContractGenerator();

System.Collections.ObjectModel.Collection<ContractDescription> contracts
            = importer.ImportAllContracts();
importer.ImportAllEndpoints();
foreach (ContractDescription contract in contracts)
{
    generator.GenerateServiceContractType(contract);
}

if (generator.Errors.Count != 0)
{
    throw new Exception("There were errors during code compilation.");
}

CodeDomProvider codeDomProvider = CodeDomProvider.CreateProvider("C#");

CompilerParameters parameters = new CompilerParameters();
parameters.CompilerOptions = string.Format(@" /lib:{0}", "\"C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\v3.0\"");
parameters.ReferencedAssemblies.Add("System.ServiceModel.dll");
parameters.ReferencedAssemblies.Add("System.Runtime.Serialization.dll");

CodeCompileUnit codeUnit = generator.TargetCompileUnit;

CompilerResults results = codeDomProvider.CompileAssemblyFromDom(parameters, codeUnit);

foreach (CompilerError oops in results.Errors)
{
    throw new Exception("Compilation Error Creating Assembly: " + oops.ErrorText);
}
return results.CompiledAssembly;

我原本期望能够使用汇编。CreateInstance(“HelloWorldService”);获取服务的实例,以便能够调用其上的方法,但当然这是null。

我错过了什么?任何想法都非常感谢。如果你需要更多细节,请告诉我。