OneDrive Error Code Handling

OneDriveError.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace Microsoft.OneDrive
{
    public class OneDriveError
    {
        [JsonProperty("error")]
        public OneDriveInnerError Error { get; set; }

        public static OneDriveError FromJson(string json)
        {
            return JsonConvert.DeserializeObject<OneDriveError>(json);
        }

        public bool IsError(string expectedErrorCode)
        {
            OneDriveInnerError errorCode = this.Error;
            while (null != errorCode)
            {
                if (errorCode.Code == expectedErrorCode)
                    return true;
                errorCode = errorCode.InnerError;
            } 
            return false;
        }
    }

    public class OneDriveInnerError
    {
        [JsonProperty("code")]
        public string Code { get; set; }

        [JsonProperty("message")]
        public string Message { get; set; }

        [JsonProperty("innererror")]
        public OneDriveInnerError InnerError { get; set; }
    }
}

Hello Microsoft why to much error code can't you fix it? is be long time sence is problem started??????