BlizzSharp/Data/AuctionResponse.cs

using System.Collections.Generic;
using Newtonsoft.Json;

namespace BlizzSharp.Data
{
    public class AuctionResponse
    {
        [JsonProperty("realms")]
        public AuctionRealm[] Realms{get;set;}

        [JsonProperty("auctions")]
        public Auction[] Auctions{get;set;}
    }
}