private void loadGrid()
        {
            MusicalEntities   context       = new MusicalEntities();
            List <instrumeto> lstIstrumento = context.instrumeto.ToList <instrumeto>();

            gridInst.DataSource = lstIstrumento;
            gridInst.DataBind();
        }
        protected void btnSalvar_Click(object sender, EventArgs e)
        {
            instrumeto inst = new instrumeto()
            {
                nome           = txtNome.Text,
                tipo           = txtTipo.Text,
                familia        = txtFamilia.Text,
                dataFabricacao = Convert.ToDateTime(txtDtFabricacao.Text)
            };

            MusicalEntities context = new MusicalEntities();

            context.instrumeto.Add(inst);
            context.SaveChanges();

            loadGrid();
        }