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System.InvalidOperationException: The connection string '' in the application's configuration file does not contain the required providerName attribute."

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System.InvalidOperationException

The connection string '' in the application's configuration file does not contain the required providerName attribute."

An unhandled exception occurred
Exception source not available.

Solution 

I added "providerName="System.Data.SqlClient" at the end of my connection string
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Apr 04, 2021 • Anyone

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