开放所有跨域 ----前端和后端### 2025-8-5 开放所有跨域 ----后端 ``` //开放所有跨域 response.AddHeader("Access-Control-Allow-Origin", "*"); response.AddHeader("Access-Control-Allow-Credentials", "true"); response.AddHeader("Access-Control-Allow-Methods", "GET,POST,PUT,DELETE,OPTIONS"); response.Add