Example of how to use .NET Refit Http Client with Polly Retry Policy

RefitHttpClientWithPollyPolicy.cs

var retryPolicy = Policy
    .Handle<ApiException>()
    .WaitAndRetryAsync(3, x => TimeSpan.FromSeconds(Math.Pow(2, x)))
    .AsAsyncPolicy<HttpResponseMessage>();

services
    .AddRefitClient<IHttpClient>()
    .ConfigureHttpClient(x => x.BaseAddress = new Uri("https://localhost:8080"))
    .AddPolicyHandler(retryPolicy);

services
    .AddRefitClient<IHttpClient>()
    .ConfigureHttpClient(x => x.BaseAddress = new Uri("https://localhost:8080"))
    .AddTransientHttpErrorPolicy(builder => builder
        .WaitAndRetryAsync(new[]
        {
            TimeSpan.FromSeconds(1),
            TimeSpan.FromSeconds(2),
            TimeSpan.FromSeconds(4)
        }));