Response.Buffer = true;
Response.Expires = -1;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
Response.Expires=0;
Response.CacheControl = "no-cache";
Response.Expires = -1;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
Response.Expires=0;
Response.CacheControl = "no-cache";