Question

int noOfAttempts = 3;
void StartServer();
bool IsServerRunning();

I need to re-attempt StartServer() 3 times based on result from IsServerRunnig(). Something like this:

StartServer();
if (!IsServerRunning())
{
    StartServer();
    if (!IsServerRunning())
    {
        StartServer();
        if (!IsServerRunning())
        {
            StartServer();
        }
    }
}

I don’t want to use for loops or the ugly code like above. Is there a better way of doing this? A way in which, I won’t have to change my code if noOfAttempts change in future?

EDIT:
I’m expecting something from the “delegate” concept (If possible).

Answer 1

UPD:

Seems like you actually want(ed) some neat way to describe retry logic. In this case look at transient-fault-handling libraries such as Polly.

---

Ok.

3.TimesUntil(IsServerRunning, StartServer); 

Delegate magic here:

public static class Extensions 
{
    public static void TimesWhile(this int count, Func<bool> predicate, Action action)
    {
        for (int i = 0; i < count && predicate(); i++) 
           action();
    }
    public static void TimesUntil(this int count, Func<bool> predicate, Action action)
    {
        for (int i = 0; i < count && !predicate(); i++) 
            action();
    }
}

To esteemed downvoters:
It’s just for fun and I’d never write this code for real projects.