Exception Info: Microsoft.Practices.Unity.ResolutionFailedException at Microsoft.Practices.Unity.UnityContainer.DoBuildUp(System.Type, System.Object, System.String, System.Collections.Generic.IEnumerable`1<Microsoft.Practices.Unity.ResolverOverride>)
at
It gives error : An unhandled exception of type 'Microsoft.Practices.ServiceLocation.ActivationException' occurred in Microsoft.Practices.ServiceLocation.dll
附加信息:尝试获取类型为IEventAggregator、键为"“的实例时发生激活错误。