Question

When I instantiate a SqlConnection object in ADO.Net, then does this code result in the execution of corresponding DbProviderFactory code ? So when the code in block 2 is executed by, then we actually end up executing code in block 1. But I am not sure if this is true.

CODE BLOCK 1 – Instantiate a SqlConnection using DbProviderFactory approach

DbProviderFactory factory =
DbProviderFactories.GetFactory(providerName);

connection = factory.CreateConnection();
connection.ConnectionString = connectionString;

CODE BLOCK 2 -Instantiate a SqlConnection using standard ADO.Net code

SqlConnection con = new SqlConnection(connectionString);

Answer 1

I had a look at some .net Framework assemblies and found the following

DbProviderFactories.GetFactory(providerName) will return an Factory object according to the given providerName.
Let’s assume providerName indicates an SQL Provider so we will get an SqlClientFactory.

Afterwards factory.CreateConnection() will be called. In this case SqlClientFactory.CreateConnection() will be called which is implemented as

public override DbConnection CreateConnection()
{
    return new SqlConnection();
}

I think the answer to your question is that calling the factory methods will call the methods of the provider specific classes and not the other way round!