練習題 (10)： Create files with date and time stamp appended to the name
本題利用 FileInfo 類別，來實作該改檔案名稱的動作。
程式碼：
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using System;
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using System.IO;
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namespace AppendDateAndTime
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{
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internal class Program
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{
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private static void Main( string [ ] args)
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{
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DateTime dt = DateTime.Now;
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string s = String.Format ( "{0:yyyyMMdd_HHmmss}", dt);
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string oldFileName = "test.txt";
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StreamWriter sw = new StreamWriter (oldFileName );
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sw.WriteLine ( "This is a test file." );
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sw.Flush ( );
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sw.Close ( );
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sw.Dispose ( );
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FileInfo fi = new FileInfo (oldFileName );
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string newFileName = fi.Name.Replace (fi.Extension, "" ) + "_" + s + fi.Extension;
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fi.MoveTo (newFileName);
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}
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}
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}
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