您可以
JsonConverter像下面这样，查找指定类型的对象或空数组。如果是对象，它将反序列化该对象。如果为空数组，则返回null：
public class JsonSingleOrEmptyArrayConverter<T> : JsonConverter where T : class{ public override bool CanConvert(Type objectType) { return typeof(T).IsAssignableFrom(objectType); } public override bool CanWrite { get { return false; } } public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) { var contract = serializer.ContractResolver.ResolveContract(objectType); if (!(contract is Newtonsoft.Json.Serialization.JsonObjectContract || contract is Newtonsoft.Json.Serialization.JsonDictionaryContract)) { throw new JsonSerializationException(string.Format("Unsupported objectType {0} at {1}.", objectType, reader.Path)); } switch (reader.SkipComments().TokenType) { case JsonToken.StartArray: { int count = 0; while (reader.Read()) { switch (reader.TokenType) { case JsonToken.Comment: break; case JsonToken.EndArray: return existingValue; default: { count++; if (count > 1) throw new JsonSerializationException(string.Format("Too many objects at path {0}.", reader.Path)); existingValue = existingValue ?? contract.DefaultCreator(); serializer.Populate(reader, existingValue); } break; } } // Should not come here. throw new JsonSerializationException(string.Format("Unclosed array at path {0}.", reader.Path)); } case JsonToken.Null: return null; case JsonToken.StartObject: existingValue = existingValue ?? contract.DefaultCreator(); serializer.Populate(reader, existingValue); return existingValue; default: throw new InvalidOperationException("Unexpected token type " + reader.TokenType.ToString()); } } public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) { throw new NotImplementedException(); }}public static partial class JsonExtensions{ public static JsonReader SkipComments(this JsonReader reader) { while (reader.TokenType == JsonToken.Comment && reader.Read()) ; return reader; }}然后像这样使用它：
public class User{ //some other fields... [JsonConverter(typeof(JsonSingleOrEmptyArrayConverter<Personal>))] public Personal personal { get; set; } //some other fields...}现在，您应该可以将用户反序列化到您的
User班级中。
笔记：
可以通过属性或在中应用转换器
JsonSerializerSettings.Converters
。该转换器并非设计为与简单类型（例如字符串）一起使用，而是为映射到JSON对象的类设计的。那是因为它
JsonSerializer.Populate()
用来避免读取过程中的无限递归。
工作样本.Net
在这里和这里摆弄。
