摘要：
An item with the same key has already been added. Key: Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal.MySqlOptionsExtension 原因是两个地方设置了连接字符串 阅读全文
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摘要：
An item with the same key has already been added. Key: Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal.MySqlOptionsExtension 原因是两个地方设置了连接字符串 阅读全文
摘要：
ModelState.IsValid 查看具体错误内容 阅读全文
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