Demo scenario using Polly's Retry policy

PollyRetryDemo.cs

private RetryPolicy CreateRetryPolicy() => Policy.Handle<Exception>()
                                                 .WaitAndRetryAsync(
                                                     Enumerable.Range(0, 3)
                                                     .Select(_ => TimeSpan.FromSeconds(5))
                                                     .ToList());

[...]

var policy = CreateRetryPolicy();
TResult result;

try
{
    result = await policy.ExecuteAsync(async () =>
    {
        var response = await httpClient.PostAsync(uri, content);
        var jsonContent = await response.Content.ReadAsStringAsync();
        var deserializedJson = await Task.Run(
            () => JsonConvert.DeserializeObject<TResult>(jsonContent, _serializerSettings));

        return deserializedJson;
    });
}
catch
{
    result = default(TResult);
}