Polly_Circuit_Breaker_ProductService.cs

public class ProductService
{
    private readonly HttpClient _httpClient;
    private readonly AsyncCircuitBreakerPolicy _circuitBreakerPolicy;

    public ProductService()
    {
        _httpClient = new HttpClient();
        _httpClient.BaseAddress = new Uri("http://localhost:5000/");

        _circuitBreakerPolicy = Policy.Handle<HttpRequestException>()
                                      .CircuitBreakerAsync(exceptionsAllowedBeforeBreaking: 2,
                                                           durationOfBreak: TimeSpan.FromMinutes(1));
    }

    public async Task<string> GetSample()
    {
       return await _circuitBreakerPolicy.ExecuteAsync<string>(async () =>
       {
           return await _httpClient.GetStringAsync("api/business");
       });
    }
}