public static async Task WriteJsonAsync(this HttpResponse response, object o, string contentType = null)
{
var json = ObjectSerializer.ToString(o);
await response.WriteJsonAsync(json, contentType);
await response.Body.FlushAsync();
}
public static async Task WriteJsonAsync(this HttpResponse response, object o)
{
var json = ObjectSerializer.ToString(o);
await response.WriteJsonAsync(json);
}