Copy the entire folder (including subfolders ).

Namespace to be referenced:
Using system. IO;

/// <Summary>
/// Copy a folder (including subfolders) to the specified folder. Both the source folder and the target folder must be in the absolute path. Format: copyfolder (source folder, target folder );
/// </Summary>
/// <Param name = "strfrompath"> </param>
/// <Param name = "strtopath"> </param>

//--------------------------------------------------
// Author: kgdiwss QQ: 305725744
//---------------------------------------------------

Public static void copyfolder (string strfrompath, string strtopath)
{
// If the source folder does not exist, create
If (! Directory. exists (strfrompath ))
{
Directory. createdirectory (strfrompath );
}

// Obtain the name of the folder to be copied
String strfoldername = strfrompath. substring (strfrompath. lastindexof ("\") + 1, strfrompath. Length-strfrompath. lastindexof ("\")-1 );

// If no source folder exists in the target folder, create the source folder in the target folder.
If (! Directory. exists (strtopath + "\" + strfoldername ))
{
Directory. createdirectory (strtopath + "\" + strfoldername );
}
// Create an array to save the file name in the source folder
String [] strfiles = directory. getfiles (strfrompath );

// Copy objects cyclically
For (INT I = 0; I <strfiles. length; I ++)
{
// Get the copied file name. Only the file name is taken and the address is truncated.
String strfilename = strfiles [I]. substring (strfiles [I]. lastindexof ("\") + 1, strfiles [I]. length-strfiles [I]. lastindexof ("\")-1 );
// Start copying an object. True indicates overwriting an object of the same name.
File. Copy (strfiles [I], strtopath + "\" + strfoldername + "\" + strfilename, true );
}

// Create a directoryinfo instance
Directoryinfo dirinfo = new directoryinfo (strfrompath );
// Obtain the names of all subfolders in the source folder
Directoryinfo [] zipath = dirinfo. getdirectories ();
For (Int J = 0; j <zipath. length; j ++)
{
// Obtain the names of all subfolders
String strzipath = strfrompath + "\" + zipath [J]. tostring ();
// Use the obtained subfolder as the new source folder and start a new round of copying from the beginning
Copyfolder (strzipath, strtopath + "\" + strfoldername );
}
}