重复序列化和反序列化会创建重复项

Hi everyone i have a problem with my json serealization. I'm using the Json.NET package under Unity: I'm searching to make a Database, editable on my application and stored on my server through wwwForm and a php file. I have no problem to create it and to push it on the net. The problem is, when i load it, the database has a new entry at the end. The Database Class is this:Hi everyone i have a problem with my json serea