private BindingList<Company> companies;
private System.Windows.Forms.BindingSource bindingSource;

        private void CompanyForm_Load(object sender, EventArgs e)
        {
            companies = new BindingList<Company>(PersistenceManager.Instance.RetrieveAll<Company>(SessionAction.BeginAndEnd));
            companies.AllowNew = true;
            companies.AllowEdit = true;

            bindingSource.DataSource = companies;

            // Add our bindings
            companyIdTextBox.DataBindings.Add("Text", companies, "Id");
            companyNameTextBox.DataBindings.Add("Text", companies, "Name");
        }

        private void toolStripSaveButton_Click(object sender, EventArgs e)
        {
            // If we have no binding source, then we cannot save
            if (null == bindingSource.Current)
            {
                return;
            }
            this.Focus();

            Company company = bindingSource.Current as Company;

            // Save our company
            PersistenceManager.Instance.Save<Company>(company);
        }