Enyim.Caching.SerializationException

[luismx]

I'm not able to run the basic implementation, the next exception appears:
Enyim.Caching.SerializationException: 'Exception 'Type '<>f__AnonymousType0`1[[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]' in Assembly 'MemCached2App1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.' while serializing '{ hello = world }'. See inner exception for details.'

This exception was originally thrown at this call stack:
System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(System.Type) in FormatterServices.cs
System.Runtime.Serialization.FormatterServices.GetSerializableMembers.AnonymousMethod__5_0(System.Runtime.Serialization.MemberHolder) in FormatterServices.cs
System.Collections.Concurrent.ConcurrentDictionary<TKey, TValue>.GetOrAdd(TKey, System.Func<TKey, TValue>) in ConcurrentDictionary.cs
System.Runtime.Serialization.FormatterServices.GetSerializableMembers(System.Type, System.Runtime.Serialization.StreamingContext) in FormatterServices.cs
System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo() in BinaryObjectInfo.cs
System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(object, System.Runtime.Serialization.ISurrogateSelector, System.Runtime.Serialization.StreamingContext, System.Runtime.Serialization.Formatters.Binary.SerObjectInfoInit, System.Runtime.Serialization.IFormatterConverter, System.Runtime.Serialization.Formatters.Binary.ObjectWriter, System.Runtime.Serialization.SerializationBinder) in BinaryObjectInfo.cs
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(object, System.Runtime.Serialization.Formatters.Binary.BinaryFormatterWriter, bool) in BinaryObjectWriter.cs
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(System.IO.Stream, object, bool) in BinaryFormatter.cs
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(System.IO.Stream, object) in BinaryFormatter.cs
Enyim.Caching.Memcached.BinaryItemFormatter.DoSerialize(Enyim.Caching.SequenceBuilder, object)
...
[Call Stack Truncated]

Using the .Net Core 3.0, VS 2019

[blackorzar]

Hello, I got the same error when trying to setup the library on ASP.Net Core project of Web API type, including the library in a Controller.
In Startup.cs I added:

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMemcached("localhost");
            services.AddControllers();            
        }

In the Controller I added:

        [HttpGet]
        public async Task<IActionResult> GetAsync()
        {
            var client = _memcachedCluster.GetClient();
            await client.SetAsync("hello", new { hello = "world" });
            return Ok(new { hello = "world" });
        }

[Fabman08]

Same error also for me