redis-get-samples.cs

public async Task<IEnumerable<Sample>> GetAll()
{
    if (cachingService.Exists(CacheKey.Samples))
    {
        return cachingService.Get<IEnumerable<Sample>>(CacheKey.Samples);
    }

    var list = await repository.GetAllAsync();

    cachingService.Set(CacheKey.Samples, samples.ToList());
    
    return list;
}