private static async Task WriteErrorResponse(this HttpContext context, ILifetimeScope scope, Exception e)
{
var webContext = scope.Resolver.Resolve <IWebContextProvider>().Get();
if (webContext.IsAjax)
{
context.Response.ContentType = "text/plain";
}
await context.Response.WriteAsync(scope.GenerateErrorResponse(e, webContext.IsAjax));
}