请编程遍历页面上所有TextBox控件并给它赋值为string.Empty？

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答：

<pre><code class=""language-c#"" lang=""c#"">foreach (System.Windows.Forms.Control control in this.Controls)
{
if (control is System.Windows.Forms.TextBox)
{
System.Windows.Forms.TextBox tb = (System.Windows.Forms.TextBox)control ;
tb.Text = String.Empty ;
}
}
</code></pre>

<pre><code> "“`