在写一个小程序需要用到，百度找不到，google找到了还是英文的。Markabel

public void updateQuestions()
{
    try
    {
        foreach (Control c in editQuestionsPanel.Controls)
        {
            if (c is TextBox)
            {
                TextBox questionTextBox = (TextBox)c;

                string question = questionTextBox.Text;

                writeNewQuestionToTblQuestions(question);
            }
        }
    }
    catch (Exception err)
    {
        Console.WriteLine(err.Message);
    }
}

冲着分数而来

楼主想问什么呢？解释？
public void updateQuestions()
{
    try
    {
        foreach (Control c in editQuestionsPanel.Controls)//循环遍历editQuestionsPanel（此处是Panel的Id）中的控件,定义为变量c
        {
            if (c is TextBox)//如果控件是TextBox，执行如下代码
            {
                TextBox questionTextBox = (TextBox)c;//定义并初始化一个textbox

                string question = questionTextBox.Text;//定义并以textbox中的text值初始化变量question

                writeNewQuestionToTblQuestions(question);//调用带有question参数的方法writeNewQuestionToTblQuestions
            }
            if（c is ……）//如果控件是……
            {
                ……方法体，具体操作内容
            }
        }
    }
    catch (Exception err)//捕获异常
    {
        Console.WriteLine(err.Message);
    }
}

foreach (Control c in editQuestionsPanel.Controls)此句即遍历panel里包含的控件

不知道 在问什么