/// <summary>
/// 查找
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
void OnFind(object sender, ExecutedRoutedEventArgs args)
{
if (winFR == null || winFR.IsLoaded == false)
winFR = new winFindAndReplace(RichTextBox1);
winFR.Show();
}
