private void tbtBuscar_Click(object sender, EventArgs e)
 {
     if (txtAlias.Text != "")
     {
         dgvProducts.DataSource = ProductsDAL.Search(txtAlias.Text);
     }
 }
 private void button4_Click(object sender, EventArgs e)
 {
     if(txtAlias.Text!="")
         dgvProducts.DataSource = ProductsDAL.Search(txtAlias.Text);
 }