Example of JsonSerializerSettings

public class Log
{
    public string Details
    {
        get;
        set;
    }
    public DateTime LogDate
    {
        get;
        set;
    }
}
Log log = new Log
{
    LogDate = new DateTime.Now,
        Details = "Application started."
};
JsonSerializerSettings microsoftDateFormatSettings = new JsonSerializerSettings
{
    DateFormatHandling = DateFormatHandling.MicrosoftDateFormat
};
string microsoftJson = JsonConvert.SerializeObject(log, microsoftDateFormatSettings);

Result:

// {"Details":"Application started.","LogDate":"\/Date(1234656000000)\/"}