IDbAccessor 设置为线程安全

[shenglingshi]

在多线程共用 IDbAccessor 时会有异常，可否调整内部DbContext实例化的方式 。 A second operation was started on this context before a previous operation completed. This is usually caused by different threads concurrently using the same instance of DbContext. For more information on how to avoid threading issues with DbContext, see https://go.microsoft.com/fwlink/?linkid=2097913.

[Coldairarrow]

多线程自行创建scope获取IDbAccessor