private void button1_Click(object sender, EventArgs e)
{
form_cliente.id = "0";
form_cliente clie = new form_cliente();
clie.Show(this);
}
private void dtgClientes_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
int selectedrowindex = dtgClientes.SelectedCells[0].RowIndex;
DataGridViewRow selectedRow = dtgClientes.Rows[selectedrowindex];
string codigo = Convert.ToString(selectedRow.Cells["id"].Value);
form_cliente.id = codigo;
form_cliente clie = new form_cliente();
clie.Show(this);
}