InvalidOperationException: The property 'EntityName' has a temporary value while attempting to change the entity's state

Question

InvalidOperationException: The property &#x27;EntityName&#x27; has a temporary value while attempting to change the entity&#x27;s state

Accepted Answer

Question: InvalidOperationException: The property 'EntityName' has a temporary value while attempting to change the entity's state to 'Modified'. Either set a permanent value explicitly, or ensure that the database is configured to generate values for this property.
Testing:

InvalidOperationException: The property 'EntityName' has a temporary value while attempting to change the entity's state

Jack said:

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