static void Main(string[] args)
{
Database database = new OracleServer();
database.delete();
database.add();
Database database1 = new SqlServer();
database1.add();
database1.delete();
}
static void Main(string[] args)
{
Database database = new SqlServer();
database.Delete();
Database database2 = new OracleServer();
database2.Delete();
Console.ReadKey();
}
