C#遍历窗体控件代码，遍历窗体所有按钮控件代码

foreach(Control c in this.Controls)
{
    listBox1.Items.Add(c.Name);
    Control c1 = c as Button;
    if(c1!=null)
    {
       c1.Text="This is A Button";
    }
}

知识点：类型转换