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);
            }
        }