using System;

using System.Linq;

using System.Reflection;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var paths = new [] {

            "FirstName",

            "LastName",

            "MiddleName",

            "Interested.Programming",

            "Interested.Football",

            "Addresses.0.Street",

            "Addresses.0.City",

        };

        foreach(var path in paths) {

            Console.WriteLine($"{path} : {PropertyExists(path, typeof(Information))}"); 

        }

    }

    /// <summary>

    /// Modfied from https://stackoverflow.com/a/18870315

    /// </summary>

    /// <param name="path"></param>

    /// <param name="instance"></param>

    /// <returns></returns>

    public static bool PropertyExists(string path, Type t)

    {

        if (string.IsNullOrEmpty(path))

            return false;

        var pp = path.Split('.');

        foreach (var prop in pp)

        {

            if (int.TryParse(prop, out var result))

            {

                /* skip array accessors */

                continue;

            }

            var propInfo = t.GetMember(prop)

                .Where(p => p is PropertyInfo)

                .Cast<PropertyInfo>()

                .FirstOrDefault();

            if (propInfo != null)

            {

                t = propInfo.PropertyType;

                if (t.GetInterfaces().Contains(typeof(IEnumerable)) && t != typeof(string))

                {

                    t = t.IsGenericType

                        ? t.GetGenericArguments()[0]

                        : t.GetElementType();

                }

            }

            else

            {

                return false;

            }

        }

        return true;

    }

}

​

​

public class Information {

    public string FirstName {get;set;}

    public string LastName {get;set;}

    public Interested Interested {get;set;}

    public IEnumerable<Address> Addresses { get;set; }

}

​

public class Interested {

    public bool Programming {get;set;}

}

​

public class Address {

    public string Street {get;set;}

}