将占位符文本添加到文本框

那不是仅仅是这样的事情：

Textbox myTxtbx = new Textbox();myTxtbx.Text = "Enter text here...";myTxtbx.GotFocus += GotFocus.EventHandle(RemoveText);myTxtbx.LostFocus += LostFocus.EventHandle(AddText);public void RemoveText(object sender, EventArgs e){    if (myTxtbx.Text == "Enter text here...")     {     myTxtbx.Text = "";    }}public void AddText(object sender, EventArgs e){    if (string.IsNullOrWhiteSpace(myTxtbx.Text))        myTxtbx.Text = "Enter text here...";}

多数民众赞成只是伪代码，但概念在那里。