public void Incluir(ModeloContato obj)
{
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = conexao.ObjetoConexao;
cmd.CommandText = "insert into contatos (NOME, EMAIL, TELEFONE) values (@nome, @email, @telefone); select @@IDENTITY";
cmd.Parameters.AddWithValue("@nome", obj.NOME);
cmd.Parameters.AddWithValue("@email", obj.EMAIL);
cmd.Parameters.AddWithValue("@telefone", obj.TELEFONE);
conexao.conectar();
obj.ID = Convert.ToInt32(cmd.ExecuteScalar());
conexao.desconectar();
}