public class Product
{
public string Name {get; set;}
public DateTime Expiry {get; set;}
public string[] Sizes {get; set;}
}
public void Main()
{
Product product = new Product();
product.Name = "Apple";
product.Expiry = new DateTime(2008, 12, 28);
product.Sizes = new string[] { "Small" };
string json = JsonConvert.SerializeObject(product, Formatting.None);
Console.WriteLine(json);
json = JsonConvert.SerializeObject(product, Formatting.Indented);
Console.WriteLine(json);
}