MyIssue

gistfile1.txt

public sealed class MyIssue
    {
	    [Fact]
	    void Verify() {
		    var serializer = new ConfigurationContainer( ).ConfigureType<SubjectRequest>( ).EnableImplicitTypingFromNamespace<MyIssue>( ).Create( ).ForTesting( );
		    var subjectRequest =
			    new SubjectRequest {
				    SomeInterface = new Subject2 { Message = "message1", Message2 = "message2" }
			    };

			var serialize = serializer.Serialize(subjectRequest);
		    serialize.Should()
		             .Be(@"<?xml version=""1.0"" encoding=""utf-8""?><SubjectRequest><Subject2><Message>message1</Message><Message2>message2</Message2></Subject2></SubjectRequest>");
		}
    }

	public interface ISomeInterface {
		string Message { get; set; }
	}

	public class Subject : ISomeInterface {
		public string Message { get; set; }
	}

	public class Subject2 : ISomeInterface {
		public string Message { get; set; }
		public string Message2 { get; set; }
	}

	public class SubjectRequest {
		public ISomeInterface SomeInterface { get; set; }
	}