Implementing retries for HTTP client requests in C# Core Framework can significantly improve the reliability and robustness of your application. Here are several good reasons why you should consider implementing retries:

1. Network Instability: Network connections are inherently unreliable due to various factors such as temporary network congestion, server-side issues, or transient failures. Retrying requests allows your application to recover from these intermittent network failures.

2. Transient Errors: Many errors encountered during HTTP requests are transient in nature, meaning they are temporary and can be resolved by retrying the request. Retrying failed requests gives your application a chance to overcome these transient errors without requiring manual intervention.

3. Increased Success Rate: Retrying failed requests increases the likelihood of successful completion, especially in scenarios where the initial failure was due to a temporary issue. This can lead to a higher success rate for your application's HTTP requests, resulting in improved overall reliability.

4. Fault Tolerance: Implementing retries enhances the fault tolerance of your application by allowing it to gracefully handle temporary failures in external dependencies, such as remote APIs or services. This ensures that your application remains functional even in the face of occasional network or service disruptions.

5. Improved User Experience: From a user perspective, encountering errors or timeouts during HTTP requests can be frustrating. By implementing retries, you can mitigate the impact of these errors and provide a smoother and more seamless user experience, reducing the likelihood of user dissatisfaction or abandonment.

6. Backoff Strategies: Implementing sophisticated retry strategies, such as exponential backoff, can further enhance the effectiveness of retries by gradually increasing the time between successive retry attempts. This helps alleviate potential congestion or overload on the server side and reduces the likelihood of exacerbating transient issues.

7. Logging and Monitoring: Retrying failed requests provides an opportunity to log and monitor these retries, allowing you to gather valuable data and insights into the stability and performance of your application's network interactions. This information can be used for troubleshooting, performance optimization, and proactive maintenance.

using System;
using System.Net.Http;
using System.Threading.Tasks;

public class RetryRequest
{
    private const int MaxRetryAttempts = 3;

    public static async Task Main()
    {
        HttpClient httpClient = new HttpClient();
        HttpResponseMessage response = null;
        int attempt = 0;
            
        retry: // this is our label targeting the retry section of the program
        try
        {
            response = await httpClient.GetAsync("http://example.com");
            if(!response.IsSuccessStatusCode)
                throw new HttpRequestException();
        }
        catch(Exception)
        {
            if (++attempt == MaxRetryAttempts)
                throw; // throw exception if max attempts reached
                
            await Task.Delay(TimeSpan.FromSeconds(attempt)); // wait before retrying

            goto retry; // here we redirect code execution to the "retry" label
        }
        
        string result = await response.Content.ReadAsStringAsync();
        Console.WriteLine(result);
    }
}

Caution: Please make sure that you are using HttpClient with a factory or named client in a production environment!!!