How do I change the sql db connection at run time in ASP.net using VB

public class AdoDatabase
{
        public string ProviderName { get; private set; }
        public string ConnectionString { get; private set; }
        public DbProviderFactory ProviderFactory { get; private set; }

        public AdoDatabase(string providerName, string connectionString)
        {
            ProviderName = providerName;
            ConnectionString = connectionString;

            ProviderFactory = DbProviderFactories.GetFactory(providerName);
        }

        public DbConnection OpenConnection()
        {
            return OpenConnection(null);
        }

        public DbConnection OpenConnection(string databaseName)
        {
            DbConnection conn = ProviderFactory.CreateConnection();
            conn.ConnectionString = ConnectionString;
            conn.Open();
            if (databaseName != null)
                conn.ChangeDatabase(databaseName);
            return conn;
        }
}