https://stackoverflow.com/questions/48690524/easy-concise-way-to-create-new-anonymous-type-that-contains-all-properties-of-a

stack.48690524.cs

void Main()
{
	var persons = new[]
	{
		new Person{Id= 1, Name="John Doe", Age=21},
		new Person{Id= 2, Name="Jane Doe", Age=22},
		new Person{Id= 3, Name="Jim Doe", Age=23},
	};

	var map = new Func<Person, dynamic>(person =>
	{
		var result = person.ToDynamic();
		result.Uuid = Guid.NewGuid();
		return result;
	});

	var results = persons
		.Select(p => map(p))
		.ToList();
	results.Dump();
	
	var json = JsonConvert.SerializeObject(results);
	json.Dump();
}

class Person
{
	public int Id { get; set; }
	public string Name { get; set; }
	public int Age { get; set; }
}

public static class Extensions
{
	public static dynamic ToDynamic(this object value)
	{
		IDictionary<string, object> expando = new ExpandoObject();
		var properties = TypeDescriptor.GetProperties(value.GetType());
		foreach (PropertyDescriptor property in properties)
		{
			expando.Add(property.Name, property.GetValue(value));
		}

		return expando as ExpandoObject;
	}
}