A way to copy an entire folder (including subfolders) (original)

Original
Need to reference namespaces:
Using System.IO;

<summary>
Copy folders (including subfolders) to the specified folder, both the source folder and the destination folder need an 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);
}

Get the name of the folder you want to copy
String strfoldername = Strfrompath.substring (Strfrompath.lastindexof ("\") + 1,strfrompath.length- Strfrompath.lastindexof ("\")-1);

Create a source folder in the destination folder if there are no source folders in the destination folder
if (! Directory.Exists (Strtopath + "\" + strfoldername))
{
Directory.CreateDirectory (Strtopath + "\" + strfoldername);
}
Create an array to save the file name under the source folder
string[] Strfiles = Directory.GetFiles (Strfrompath);

Cycle Copy Files
for (int i = 0;i < strfiles.length;i++)
{
Gets the file name of the copy, takes only the filename, and the address is truncated.
String strFileName = Strfiles[i]. Substring (Strfiles[i]. LastIndexOf ("\") + 1,strfiles[i]. Length-strfiles[i]. LastIndexOf ("\")-1);
Start copying file, true to overwrite file with same name
File.Copy (Strfiles[i],strtopath + "\" + strfoldername + "\" + strfilename,true);
}

Create a DirectoryInfo instance
DirectoryInfo dirinfo = new DirectoryInfo (Strfrompath);
To get all the subfolder names under the source folder
directoryinfo[] Zipath = Dirinfo.getdirectories ();
for (int j = 0;j < zipath.length;j++)
{
Get all child folder names
String Strzipath = Strfrompath + "\" + zipath[j]. ToString ();
Take the resulting subfolder as a new source folder and start a new round of copies from scratch
CopyFolder (Strzipath,strtopath + "\" + strfoldername);
}
}