C# Copy一个文件到另一个文件夹下

  public static void CopyToFile()
         {
             //源文件路径
             string sourceName = @"D:\Source\Test.txt";

             //目标路径:项目下的NewTest文件夹,(如果没有就创建该文件夹)
             string folderPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "NewTest");
             if (!Directory.Exists(folderPath))
             {
                 Directory.CreateDirectory(folderPath);
             }

             //文件不用新的文件名，就用原文件文件名
             string fileName = Path.GetFileName(sourceName);
             ////可以选择给文件换个新名字
             //string fileName = string.Format("{0}.{1}", "newFileText", "txt");

             //目标整体路径
             string targetPath = Path.Combine(folderPath, fileName);

             //Copy到新文件下
             FileInfo file = new FileInfo(sourceName);
             if (file.Exists)
             {
                 //true 覆盖已存在的同名文件，false不覆盖
                 file.CopyTo(targetPath, true);
             }
         }