using System;

using System.Collections.Generic;

​

public class Program { public static void Main() { Console.WriteLine("Hello World"); } }

​

public interface IFieldRetriever<T>

{

    IDictionary<string, T> GetFields();

}

​

public class CustomerDto<T> : IFieldRetriever<T>

{

    public string Name { get; set; }

    public int age { get; set; }

    public IDictionary<string, T> GetFields()

    {

        var dictFields = new Dictionary<string, T>();

​

        foreach (var property in typeof(CustomerDto<>).MakeGenericType(typeof(T)).GetProperties())

        {

            var value = property.GetValue(this);

            if (value == null && typeof(T).IsValueType)

            {

                value = Activator.CreateInstance<T>();

            }

            else if (value == null)

            {

                continue;

            }

            dictFields.Add(property.Name, (T)value!);

        }

       return dictFields;

    }

}