JsonFeed jsonFeed = JsonFeed.Parse(jsonFeedString);

JsonFeed jsonFeed = await JsonFeed.ParseFromUriAsync(new Uri(@"https://jsonfeed.org/feed.json"));

var jsonFeed = new JsonFeed
{
    Version = @"https://jsonfeed.org/version/1",
    Title = "Dan Rigby",
    Description = "Mobile App Development & More.",
    HomePageUrl = @"http://danrigby.com",
    FeedUrl = @"http://danrigby.com/feed.json",
    Author = new Author
    {
        Name = "Dan Rigby",
        Url = @"https://twitter.com/DanRigby"
    },
    Items = new List<FeedItem>
    {
        new FeedItem
        {
            Id = @"http://danrigby.com/2015/09/12/inotifypropertychanged-the-net-4-6-way/",
            Url = @"http://danrigby.com/2015/09/12/inotifypropertychanged-the-net-4-6-way/",
            Title = "INotifyPropertyChanged, The .NET 4.6 Way",
            ContentText = @"This would be the text of my blog post, but that would be way too verbose to put in this sample. (;",
            DatePublished = new DateTime(2015, 09, 12)
        }
    }
};

string jsonFeedString = jsonFeed.Serialize();