SHELL

linux move all files up a directory

mv myfolder/* .

Move all files from a folder in linux

mv source_path/* destination_path/

here you have to put forward slash and * after source path so that it will take files inside source_path instead of the complete source directory.
The above command moves all files (unless they are hidden) in the source directory to the destination directory.

bash command to move all files to a dir

/*A bash command to move all the files in current dir to dirDest dir.
* The sign '*' stands for 'all files'
*/

mv * /dirDest

Move All files in a Directory

        if (System.IO.Directory.Exists(sourcePath))
        {
            string[] files = System.IO.Directory.GetFiles(sourcePath);

            // Copy the files and overwrite destination files if they already exist.
            foreach (string s in files)
            {
                // Use static Path methods to extract only the file name from the path.
                fileName = System.IO.Path.GetFileName(s);
                destFile = System.IO.Path.Combine(targetPath, fileName);
                System.IO.File.Copy(s, destFile, true);
            }
        }
        else
        {
            Console.WriteLine("Source path does not exist!");
        }