PollyApiService.cs

public class ApiService : IApiService
{
    readonly IClient _client;
    readonly INetworkService _networkService;

    public ApiService(IClient client, INetworkService networkService)
    {
        _client = client;
        _networkService = networkService;
    }
    // No policies
    public async Task<T> GetAsync<T>(Uri uri) where T : class
    {
        return await ProcessGetRequest<T>(uri);
    }
    
    // With policies
    public async Task<T> GetAndRetry<T>(Uri uri, int retryCount, Func<Exception, int, Task> onRetry = null) where T : class
    {
        var func = new Func<Task<T>>(() => ProcessGetRequest<T>(uri));
        return await _networkService.Retry<T>(func, retryCount, onRetry, cancelToken);
    }

    public async Task<T> GetWaitAndTry<T>(Uri uri, Func<int, TimeSpan> sleepDurationProvider, int retryCount, Func<Exception, TimeSpan, Task> onWaitAndRetry = null) where T : class
    {
        var func = new Func<Task<T>>(() => ProcessGetRequest<T>(uri));
        return await _networkService.WaitAndRetry<T>(func, sleepDurationProvider, retryCount, onWaitAndRetry, cancellationToken);
    }
}