Presence of various section in app.config breaks initialiser

The presence of a configSections in an app.config breaks the connection initialiser. To reproduce just create the most basic app possible (server name etc. is irrelevant):

using Microsoft.Data.SqlClient;

namespace TestSQL
{
    class Program
    {
        static void Main(string[] args)
        {
            var connection = new SqlConnection("data source=.;initial catalog=blah;Trusted_Connection=Yes;persist security info=False");
            connection.Open();
        }
    }
}

Adding an app.config with various combinations of sections such as

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <appSettings>
        <add key="ConfigFolder" value="./config" />
    </appSettings>
    <configSections>
        <clear />
    </configSections>
</configuration>

causes the exception, as does adding a <system.diagnostics> section.

Unhandled exception. System.TypeInitializationException: The type initializer for 'Microsoft.Data.SqlClient.SqlAuthenticationProviderManager' threw an exception.
 ---> System.InvalidOperationException: Failed to read the config section for authentication providers.
 ---> System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize
 ---> System.Configuration.ConfigurationErrorsException: Only one <configSections> element allowed per config file and if present must be the first child of the root <configuration> element. (C:\Users\Jason\RiderProjects\TestSQL\TestSQL\bin\Debug\netcoreapp3.
0\TestSQL.dll.config line 6)
   at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
   at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
   at System.Configuration.BaseConfigurationRecord.ThrowIfInitErrors()
   at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
   --- End of inner exception stack trace ---
   at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
   at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName)
   at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
   at System.Configuration.ConfigurationManager.GetSection(String sectionName)
   at Microsoft.Data.SqlClient.SqlAuthenticationProviderManager..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.Data.SqlClient.SqlAuthenticationProviderManager..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserIn
stance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling, String accessToken, DbConnectionPool pool, SqlAuthenticationProviderManager sqlAuthProviderManager)
   at Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
   at Microsoft.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
   at Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at Microsoft.Data.SqlClient.SqlConnection.Open()
   at TestSQL.Program.Main(String[] args) in C:\Users\Jason\RiderProjects\TestSQL\TestSQL\Program.cs:line 10

This is on .Net Core 3.0 or 3.1, Microsoft.Data.SqlClient, Version=1.12.20106.1

[jsobell]

Awesome speedy work @cheenamalhotra We’re still on 1.1 so can’t test, but did a code review and looks perfect, thanks.

[cheenamalhotra]

@jsobell

Please give PR #573 a try and let us know!