using System;

using Newtonsoft.Json;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

​

public class Program

{

    public static void Main()

    {

        var contact = new SyncContact { FirstName="Test", LastName="Person", Phone="123-123-1234", Email="test@test.com"};

        var t = typeof(SyncContact);

        var props = t.GetProperties().Select(p => new { p, attr = p.GetCustomAttribute<SyncProperty>() }).Where(p => p.attr != null);

        var dict = props.ToDictionary(p => p.attr.PropertyName, v => v.p.GetValue(contact) );

        dict.Dump();                                       

    }

​

}

​

public class SyncProperty : Attribute

{

    public readonly string PropertyName;

​

    public SyncProperty(string propertyName)

    {

        this.PropertyName = propertyName;

    }

}

​

public class SyncContact

{

    [SyncProperty("first_name")]

    public string FirstName { get; set; }

​

    [SyncProperty("last_name")]

    public string LastName { get; set; }

​

    [SyncProperty("phone")]

    public string Phone { get; set; }

​

    [SyncProperty("email")]

    public string Email { get; set; }

}