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);
}