The provider did not return a providermanifesttoken string ASP.NET

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I'm Using ASP.NET MVC

This is my Configuration Connection String but i cannot connect to the database

Exception - An error occurred while getting provider information from the database. This can be caused by Entity Framework using an incorrect connection string. Check the inner exceptions for details and ensure that the connection string is correct.

Inner Exception - The provider did not return a ProviderManifestToken string.

C#

Why is that ? what is the Wrong ?
 
Thank in advance!


  <connectionStrings>
    <add name="ReportReffAddContext" providerName="System.Data.SqlClient" connectionString="Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\OilSystem.mdf;Integrated Security=True" />
  </connectionStrings>

What I have tried:

remove the data directory and replace the local path but no Luck

Posted 26-Feb-17 7:43am

Manoj Chamikara

Updated 26-Feb-17 11:45am

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Bryian Tan · Answer 1 · 2017-02-26T11:45:00

Google is your best resources too.

Let me Google that for you[^]

Here are some links that describe the exact same issue and might help your case
Issue : The provider did not return a ProviderManifestToken string.[^]

Error: The provider did not return a ProviderManifestToken string[^]

Also, I would suggest replace (LocalDB) with . and make sure the SQL instance service is running