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Mastering C# for .NET Developers

Solution: Shipping API Timeout Fallback

Explore how to implement a timeout fallback for a Shipping API in C# using asynchronous programming. Understand how to await tasks with a timeout, catch exceptions, and provide alternate responses to maintain application reliability.

We'll cover the following...
C# 14.0
using System.Threading.Tasks;
namespace Logistics;
public class ShippingCalculator
{
    public async Task<string> GetRateWithFallbackAsync()
    {
        try
        {
            string liveRate = await GetLiveShippingRateAsync().WaitAsync(TimeSpan.FromSeconds(2));
            return liveRate;
        }
        catch (TimeoutException)
        {
            return "$10.00";
        }
    }
    private async Task<string> GetLiveShippingRateAsync()
    {
        Random rnd = new Random();
        int delay = rnd.Next(1000, 4000);
        
        await Task.Delay(delay); 
        return "$15.50";
    }
}
...