How to get folder details and sub folders / files details in C#

No one here don't give exact codes of what you want.You need to try yourself and come here when you get stuck.Have a start from here which will help you a lot..
Example for FolderBrowserDialog in C#[^]
http://onemancoder.wordpress.com/2012/01/27/a-better-folderbrowserdialog-in-c/[^]
http://www.c-sharpcorner.com/uploadfile/mahesh/folderbrowserdialog-in-C-Sharp/[^]

There is no simple single command to do that - but it isn't that difficult. The only complication is avoiding processing system files and folders when you iterate through folders (if you do, an exception will be thrown):

private bool IsIgnorable( string dir )
    {
    if (dir.EndsWith( ":System Volume Information" )) return true;
    if (dir.Contains( ":$RECYCLE.BIN" )) return true;
    return false;
    }

Other than that, it's just a case for recursing through folders, getting the files and folders list, and processing them using the FileInfo class:

foreach (string s in Directory.GetFiles( dir ))
    {
    FileInfo fi = new FileInfo( s );
    size += fi.Length;
    }

Hi,

Refer
http://www.csharptutorial.in/14/csharp-net-how-to-use-folderbrowserdialog-in-csharp[^]