public async override Task Invoke(AspectContext context, AspectDelegate next) { await context.Invoke(next); var httpContext = context.GetHttpContext(); if (httpContext != null) { var modelState = httpContext.Items["modelstate-aspectcore"] as ModelStateDictionary; if (modelState != null) { var dataState = GetDataState(context.Implementation); if (dataState != null) { foreach (var error in dataState.Errors) { modelState.AddModelError(error.Key, error.ErrorMessage); } } } } }