Directory.CreateDirectory(destdir);

static extern bool CreateDirectoryEx(string lpTemplateDirectory,

      Directory.CreateDirectory(tempFolderName);

        dirInfo = Directory.CreateDirectory(fFoldername)

        My.Computer.FileSystem.CreateDirectory(FI.DirectoryName)

static extern bool FtpCreateDirectory(IntPtr hConnect, string lpszDirectory);

  Private Shared Function FtpCreateDirectory(ByVal hConnect As IntPtr, ByVal lpszDirectory As String) As Boolean

public static extern bool CeCreateDirectory(

function info on msdn at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceactsy/html/cerefCeCreateDirectoryRAPI.asp

CeCreateDirectory("\\test", System.IntPtr.Zero);

        Directory.CreateDirectory(rppFolder);

        static extern bool CreateDirectory(string lpPathName, SECURITY_ATTRIBUTES lpSecurityAttributes);        

            CreateDirectory(path, lpSecurityAttributes);

static extern int SHCreateDirectoryEx(IntPtr hwnd, string pszPath, IntPtr psa);

SHCreateDirectoryEx(IntPtr.Zero, @"D:\test\", IntPtr.Zero);