По вашей ссылке такая

-----

Вообще-то - такая:

    // Root myDeserializedClass = JsonConvert.DeserializeObject(myJsonResponse); 
    public class Item
    {
        [JsonConstructor]
        public Item(
            [JsonProperty("prop1")] string prop1,
            [JsonProperty("prop2")] string prop2,
            [JsonProperty("description")] string description
        )
        {
            this.Prop1 = prop1;
            this.Prop2 = prop2;
            this.Description = description;
        }

        [JsonProperty("prop1")]
        public string Prop1 { get; }

        [JsonProperty("prop2")]
        public string Prop2 { get; }

        [JsonProperty("description")]
        public string Description { get; }
    }

    public class Root
    {
        [JsonConstructor]
        public Root(
            [JsonProperty("items")] List items
        )
        {
            this.Items = items;
        }

        [JsonProperty("items")]
        public IReadOnlyList Items { get; }
    }