Why i cannot run my MVC5 app, error from web.config file?

Question

In my MVC applications WebUI project's web.config file was modified with the following connectionStrings tags

    <connectionStrings>
    <add name="EFDbContext" connectionString="Data Source=(localdb)\v11.0;Initial Catalog=SportsStore;Integrated Security=True"  providerName="System.Data.SqlClient"/>
  </connectionStrings>

  <configSections>    
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>

When hit F5 it gives me the following error page shown on the link below, can any one tell me why and how to fix this?

Note: Without connection string in <connectionStrings>...</connectionStrings> it works. but why is the error?

https://1drv.ms/a/s!AnpqTBe4ZZ2hbO7cMNILg4PTeBk

Answer 1

Just as the error message says. You can only have 1 configSections element in your config file. Furthermore, it must be the first child element of <configuration> in the config file.

<configuration>
    <configSections>    
        <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </configSections>

    <connectionStrings>
        <add name="EFDbContext" connectionString="Data Source=(localdb)\v11.0;Initial Catalog=SportsStore;Integrated Security=True"  providerName="System.Data.SqlClient"/>
    </connectionStrings>
</configuration>

From MSDN :

Remarks

If this element is in a configuration file, it must be the first child element of the <configuration> element.

References:

• <configSections> element for <configuration>
• Configuration File Schema

Answer 2

  <configSections>    
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>

        <connectionStrings>
    <add name="EFDbContext" connectionString="Data Source=(localdb)\v11.0;Initial Catalog=SportsStore;Integrated Security=True"  providerName="System.Data.SqlClient"/>
  </connectionStrings>

Swap <connectiornStrings> with <confogSections>

Error says you can have only one configSection attribute as well as it must be first in the config file.