Does JsonIgnore not work when a property has data? I have the followin class:

public class SomeObject
    {
        public string Name { get; set; }
        public DateTime Created { get; set; }
        public List<string> ErrorList { get; set; }

        [JsonIgnore]
        public Dictionary<string, object> Parameters { get; set; }

        public SomeObject()
        {
            this.ErrorList = new List<string>();
            this.Parameters = new Dictionary<string, object>();
        }
    }

My expectation was that JsonIgnore would exclude properties from De- / Serialization. My RavenDB document has data. Am I missing something?