C# - How to rename a directory

string oldpath;
string newpath;
 
// Using System.Directory
Directory.Move(oldpath, newpath);
 
// Using System.IO.DirectoryInfo
new DirectoryInfo(oldpath).MoveTo(newpath);

// Using Win32 MoveFile
[DllImport("kernel32.dll", SetLastError=true)]
static extern bool MoveFile(string lpExistingFileName, string lpNewFileName);
 
bool ret = MoveFile(oldpath, newpath);
int error = Marshal.GetLastWin32Error();
 
// Using Win32 MoveFileEx
[DllImport("kernel32.dll", SetLastError = true)]
static extern bool MoveFileEx(string lpExistingFileName, string lpNewFileName, uint flags);
 
bool ret = MoveFileEx(oldpath, newpath, 0);
int error = Marshal.GetLastWin32Error();