Handling Single Object and Multiple Object JSON Converter

Deserializing Single Object and Multiple Object using JSON Converter.

JSON Sample
this is Single Json Object 

{
 "Name":"Test",
 "Email":"Abc",
 "ID":1
}     

Multi Json Object

[
   {
     "Name": "Test",
     "Email": "Abc",
     "ID": 1
   },
   {
     "Name": "Test1",
     "Email": "Abc1",
     "ID": 2
   }
]

List<Employee> list = JsonConvert.DeserializeObject<List<Employee>>("string json Content");

Here if your JSON string contain single object that time it cause error like "'Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List'."

so to avoid this use the JSON Converter.

Example: 

JsonSerializerSettings setting = new JsonSerializerSettings();
setting.Converters.Add(new SingleOrArrayConverter<Employee>());
 
List<Employee> list = JsonConvert.DeserializeObject<List<Employee>>("string json Content",setting);

Custom Class For Converting Object Result into JSON

Public class SingleOrArrayConverter<T> : JsonConverter
{
     public override bool CanConvert(Type objectType)
     {
         return (objectType == typeof(List<T>));
     }
     public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
     {
         JToken token = JToken.Load(reader);
         if (token.Type == JTokenType.Array)
         {
             return token.ToObject<List<T>>();
         }
         return new List<T> { token.ToObject<T>() };
 
     }
     public override bool CanWrite
     {
         get { return false; }
     }
     public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
     {
         throw new NotImplementedException();
     }
 
}