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Entity framework multiple await asynchronous operations

asynchronous entiti framework

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#1 nguyen si phong

nguyen si phong

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Geschrieben: 18 May 2019 - 05:17

When I added or deleted the category (product, manufacture), an error occurred:

A second operation started on this context before a previous asynchronous operation completed.
Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.
Any instance members are not guaranteed to be thread safe.

Please help me!