public class BaseController : Controller{ /// <summary>        /// Called before the action method is invoked.        /// </summary>        /// <param name="filterContext">Information about the current request and action.</param>        protected override void OnActionExecuting(ActionExecutingContext filterContext)        {            foreach (var iBaseService in _iBaseServiceList)            {                iBaseService.Language = Language;            }            if (filterContext.HttpContext.Response.Filter == null) return;            var acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];            if (String.IsNullOrEmpty(acceptEncoding)) return;            var response = filterContext.HttpContext.Response;            acceptEncoding = acceptEncoding.ToUpperInvariant();            if (acceptEncoding.Contains("GZIP"))            {                response.AppendHeader("Content-Encoding", "gzip");                response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);            }            else if (acceptEncoding.Contains("DEFLATE"))            {                response.AppendHeader("Content-Encoding", "deflate");                response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);            }            base.OnActionExecuting(filterContext);        }}