Application.OpenForms encapsulation

有没有办法将这个函数封装在静态类中？

private void btnAddWorker_ItemClick(object sender, ItemClickEventArgs e)
{
    bool isOpen = false;
    foreach (Form _f in Application.OpenForms)
    {
        if (_f is frmAddWorker)
        {
            isOpen = true;
            _f.Focus();
            break;
        }
    }
    if (isOpen == false)
    {
        frmAddWorker AddWorker = new frmAddWorker() { MdiParent = this };
        AddWorker.Show();
    }
}

像这样：

public class Forms(){public void openForm(form _f){...}}

我想防止在所有打开的表单按钮中编写原始代码。

public static void Focus<T>(Form parent) where T : System.Windows.Forms.Form
{
    bool isOpen = false;
    foreach (var f in Application.OpenForms)
    {
        if (f is T)
        {
            isOpen = true;
            (f as Form).Focus();
            break;    
        }
     }
     if (!isOpen)
     {
         T newForm = Activator.CreateInstance<T>();
         newForm.MdiParent = parent;
         newForm.Show();
     }
}

StaticClass.Focus<frmAddWorker>(this);