why JSON Array data not binding on Model ASP.NET ?

Hi Experts,


Its hard to figure out why some format of JSON data binds and why other not . Here is my JSON data

{ 'code': 'INVOICE', 'From': '22/02/2017', 'To': '22/02/2017', 'InvoiceType': ['supplier'] }

and Model Class File

 
public class InvoiceInput    
{       
 public string code { get; set; } 
        public string From { get; set; } 
               public string To { get; set; } 
                      public List InvoiceType = new List(); 
                         }

.
But what am getting is always null on the InvoiceType field and other field are binding perfectly.
Please give some best resource for model binding
Thanks in Advance Experts