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walk(), and glob module are the methods available to iterate over files. A directory is also known as a folder. It is a collection of files and subdirectories. The module os is useful to work with directories.
The syntax to loop through each file individually in a loop is: create a variable (f for file, for example). Then define the data set you want the variable to cycle through. In this case, cycle through all files in the current directory using the * wildcard character (the * wildcard matches everything).
You can use opendir / readdir / closedir. Sample code which searches a directory for entry ``name'' is: len = strlen(name); dirp = opendir("."); while ((dp = readdir(dirp)) !=
string[] files =
Directory.GetFiles(txtPath.Text, "*ProfileHandler.cs", SearchOption.AllDirectories);
That last parameter effects exactly what you're referring to. Set it to AllDirectories for every file including in subfolders, and set it to TopDirectoryOnly if you only want to search in the directory given and not subfolders.
Refer to MDSN for details: https://msdn.microsoft.com/en-us/library/ms143316(v=vs.110).aspx
try below code
Directory.GetFiles(txtFolderPath.Text, "*ProfileHandler.cs",SearchOption.AllDirectories)
You can have a look at this page showing Deep Folder Copy, it uses recursive means to iterate throught the files and has some really nice tips, like filtering techniques etc.
http://www.codeproject.com/Tips/512208/Folder-Directory-Deep-Copy-including-sub-directori
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