private void button3_Click(object sender, EventArgs e) { string CurpAux = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[6].Value.ToString(); if (CurpAux != null) { int i = 1; Presentacion.Create Create = new Presentacion.Create(i); using (testEntities5 db = new testEntities5()) { db.Delete_Usr(CurpAux); } Refresh(); } }