Question: I have developed a website using asp.net in C#.

When a user click on a button I have to collect some data from servers and show results. My code is something like this:

```
 public partial class _Default : System.Web.UI.Page
 {
     protected void Button1_Click(object sender, EventArgs e)
     {
         string string1 = new MyServer1().SendRequest("Request1");

         string string2 = new MyServer2().SendRequest("Request2");

         string string3 = new MyServer3().SendRequest("Request3");

         string string4 = new MyServer4().SendRequest("Request4");

         Response.Write(string1 + string2 + string3 + string4);
      }
 }

```

Each `SendRequest` method takes a long time (between 20 to 40 seconds) to return result. Is it possible to run all `SendRequest` methods simultaneously and when all have executed show results?

Answer: 
Your using a class in your css `.nav` but your using a id in your html change the class to an id in your css `#nav`
I'm the person who asked this question. I'm quite sure it's a refresh, caching issue by the server. Or the loads to the server aren't working correctly.

Sometimes old versions appear, other times new. It's a mix of random timing for when the old appears. Sometimes it's after the new has posted and I've loaded the new. 

Notably: It's obvious the .css file needs to be uploaded for the tag modification to be implemented, while the longer line of .css in the file with a full class setup got implemented immediately every time even when not uploaded to the server. No idea why these would be different, but it's a consistent pattern.

There were old .css styling reappearing, after it's already brought new up. So I'm not sure what cacheing is happening & when. It may be specific to my website provider's tools.

It's definitely not the .nav issue because I as I said in the question, I didn't have the .nav in while running the tests. (Though those comments did answer another question for me on .css syntax (#id vs .class ) that I was puzzled about.)

Thanks for being here and letting me know what you thought. It at the least verified it wasn't something basic I was missing. And kept me sane while at a frustrating point.

Website is up and running with it working including the paypal and input forms.