.NET Command Line Tools (1.0.1)

Product Information:
 Version:            1.0.1
 Commit SHA-1 hash:  005db40cd1

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  16.04
 OS Platform: Linux
 RID:         ubuntu.16.04-x64
 Base Path:   /usr/share/dotnet/sdk/1.0.1

using System;

namespace msgpack_cli_test
{
    using MessagePack;
    // if this class is public struct, success
    [MessagePackObject]
    struct TestObject
    {
        [Key(0)]
        public int A{get;set;}
        [Key(1)]
        public string B{get;set;}
    }
    class Program
    {
        static void Main(string[] args)
        {
            var obj  = new TestObject()
            {
                A = 100,
                B = "piyopiyo"
            };
            var data = MessagePackSerializer.Serialize(obj);
            Console.WriteLine($"{data.Length}");
            var x = MessagePackSerializer.Deserialize<TestObject>(data);
            Console.WriteLine($"{x.A}");
        }
    }
}

Unhandled Exception: System.TypeLoadException: Type 'MessagePack.Formatters.msgpack_cli_test_TestObjectFormatter' from assembly 'MessagePack.Resolvers.DynamicObjectResolver, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is attempting to implement an inaccessible interface.
   at MessagePack.FormatterResolverExtensions.GetFormatterWithVerify[T](IFormatterResolver resolver)
   at MessagePack.MessagePackSerializer.Serialize[T](T obj, IFormatterResolver resolver)
   at msgpack_cli_test.Program.Main(String[] args) in /home/malion/src/msgpack-cli-test/Program.cs:line 23