using System;

using System.Reflection;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var person = new Person();

        person.Age = 34;

        person.Name = "Danish Farman";

        person.DateOfBirth = "10/03/1986";

        Console.WriteLine("Before dynamic updated format assignment");

        Console.WriteLine(JsonConvert.SerializeObject(person));

        var formatter = new DateTimeStringFormatter<Person>();

        formatter.Convert(person);

        Console.WriteLine("After dynamic updated format assignment");

        Console.WriteLine(JsonConvert.SerializeObject(person));

    }

}

​

public class Person

{

​

​

    public string Name

    {

        get;

        set;

    }

​

    public int Age

    {

        get;

        set;

    }

​

    public string DateOfBirth

    {

        get;

        set;

    }

}

​

public class DateTimeStringFormatter<T>

    where T : class

{

    private string convertIntoFormat = "dd MMM yyyy";

    private string dateTimeParserFormat = "dd/MM/yyyy";

    //private string dateTimeParserFormat = "dd.MM.yyyy HH:mm:ss";

    private string propertyContainsText = "date";

    public void Convert(T valueToCheck)

    {

        Type type = typeof(T);

        PropertyInfo[] properties = type.GetProperties();

        foreach (PropertyInfo property in properties)

        {

            if (property.Name.ToLower().Contains(propertyContainsText))

            {

                DateTime dateTime;

                var input = property.GetValue(valueToCheck, null).ToString();

                if (DateTime.TryParseExact(input, dateTimeParserFormat, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out dateTime))

                {

                    Console.WriteLine(dateTime.ToString(convertIntoFormat));

                    property.SetValue(valueToCheck, dateTime.ToString(convertIntoFormat));

                }

            }

        }

    }

}