Constructor mapping is not working for class but struct.

Program.cs

using AutoMapper;
using System.Diagnostics;

namespace ConstructorMappingTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var configuration = new MapperConfiguration(cfg =>
            {
                cfg.CreateMap<Source, Destination>();
                cfg.CreateMap<Source, DestinationClass>();
            });

            var mapper = configuration.CreateMapper();
            var source = new Source { Property = "value" };

            // even readonly struct is ok
            var prev = new Destination("prev");
            var destination = mapper.Map(source, prev);
            Debug.Assert(destination.Property == "value");

            // but class, no luck.
            var prevClass = new DestinationClass("prev");
            var destinationClass = mapper.Map(source, prevClass);
            Debug.Assert(destinationClass.Property == "value");
        }

        public struct Source
        {
            public string Property { get; set; }
        }
        // readonly struct version---------------------------
        public readonly struct Destination
        {
            public Destination(string property)
            {
                Property = property;
            }
            public string Property { get; }
        }
        // class version---------------------------
        public class DestinationClass
        {
            public DestinationClass(string property)
            {
                Property = property;
            }
            public string Property { get; }
        }
    }
}