An item with the same key has already been added. Key: Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal.MySqlOptionsExtension
原因是兩個地方設置了連接字符串
去掉一個即可
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System.ArgumentException: 已添加了具有相同鍵的項。(An item with the same key has already been added) 在 System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) 在 System.Web.Mvc.Js
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