C# Online Compiler | .NET Fiddle

using System;
using AutoMapper;
using System.Collections.Generic;

public class Person
{
	public string FirstName { get; set; }
	public string LastName { get; set; }
	public int Age { get; set; }
	public string DateOfBirth { get; set; }
	
	
}


public class PersonVM
{
	public string FirstName { get; set; }
	public string LastName { get; set; }
	public int Age { get; set; }
	public DateTime DateOfBirth { get; set; }
		
	
	
}

public class DateTimeConverterForString : ITypeConverter<string, DateTime>
{
	public DateTime Convert(ResolutionContext context)
	{
		return System.Convert.ToDateTime(context.SourceValue);
	}
}

public class Program
{
	public static void Main()		
	{
		
		
		Mapper.CreateMap<string,DateTime>().ConvertUsing(new DateTimeConverterForString());
		Mapper.CreateMap<Person, PersonVM>();		
										 
				
		var person = new Person(){ FirstName="Virat" , LastName = "Kohli", Age=27, DateOfBirth = "03-24-1991" };
		
		
		var item = Mapper.Map<PersonVM>(person);

		
		Console.WriteLine("\nitem.FirstName : {0} \nitem.LastName : {1} \nitem.Age : {2} \nitem.DateOfBirth : {3} ",
						  item.FirstName, item.LastName, item.Age, item.DateOfBirth);
		

	}
}