public DefaultBuildContext(IExport targetExport, BuildMode mode, IContainer container, string contractName, ErrorTracer errorTracer, BuildParameter[] parameters, IResolverExtension[] resolverExtensions) { Contract.Requires<ArgumentNullException>(targetExport != null, "targetExport"); Contract.Requires<ArgumentNullException>(container != null, "container"); Contract.Requires<ArgumentNullException>(errorTracer != null, "errorTracer"); Metadata = targetExport.GetNamedExportMetadata(contractName); errorTracer.Export = Metadata.ToString(); ExportType = targetExport.ImplementType; Target = null; BuildCompled = false; Policys = new PolicyList(); Mode = mode; Container = container; ErrorTracer = errorTracer; Parameters = parameters; ResolverExtensions = resolverExtensions; }