directoryTree.cs

using System;
using System.IO;
using System.Text;

class directoryTree {
	static int nestingLevel = 0;

	static void printSpaces(int n) {
		n *= 3;

		for (; n > 0; n--) {
			Console.Write(' ');
		}
	}

	static void printFilesInDir(DirectoryInfo dirInf) {
		foreach (FileInfo file in dirInf.GetFiles()) {
			printSpaces(nestingLevel);
			Console.Write(file.Name + "\n");
		}
	}

	static void traceDirectoryTree(DirectoryInfo dirInfo) {
		//  Для того щоб не виводити поточний каталог, а лише його дочірні каталоги
		if (nestingLevel > 0) {
			printSpaces(nestingLevel);

			Console.ForegroundColor = ConsoleColor.Cyan;
			Console.Write(dirInfo.Name + "\n");
			Console.ForegroundColor = ConsoleColor.White;
		}


		nestingLevel += 1;

		printFilesInDir(dirInfo);

		DirectoryInfo[] subDirs = dirInfo.GetDirectories();

		if (subDirs.Length != 0) {
			for (int i = 0; i < subDirs.Length; i++) {
				traceDirectoryTree(subDirs[i]);
			}
		}

		nestingLevel -= 1;
	}


	static void Main(string[] args) {
		Console.OutputEncoding = Encoding.UTF8;
		string path;
		
		if (args.Length == 0) {
			path = ".";
		} 
		else {
			path = args[0];
		}

		DirectoryInfo dir = new DirectoryInfo( path );
		traceDirectoryTree(dir);
	}
}