怎么去更改文件名及文件扩展名??

[lion533335]

用什么方法去更改文件名,及文件扩展名??

[xingyaohua]

1.
File.Move(srcFileName,destFileName)
Directory.Move(srcFolderPath,destFolderPath)
2.
FileInfo file=new FileInfo(srcFileName);
file.MoveTo(destFileName);
DirectoryInfo folder=new DirectoryInfo(srcFolderPath);
folder.MoveTo(destFolderPath);





FileInfo inf=new FileInfo(@"e:\123.xml");
inf.MoveTo(@"e:\1234.xml");


if ( System.Io.File.Exists( filename ) )
{
}
or

FileInfo fi = new FileInfo( fileName );
if ( fi.Exists )
{
}