1. Full File Listing



2. Filtered File Listing





3. Folder Statistics: Display the following statistics about all the files in the current folder. Do not list any files in this case.
Files in: C:\Windows
Total files: 49
Total size of all files: 7121424 bytes
Largest file: explorer.exe, 2871808 bytes
Average file length: 145335 bytes




4. Quit, to exit the program
After each operation (except 4) is complete wait for the user to press a key to continue, displaying an appropriate message to this effect. After the key press, the program should clear the screen, then return to the welcome message and the user may select another operation.

This is mine though, still struggling 'tryparsing' the int from Console.ReadLine();

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO; //This is added as we were asked to include it on this project
using System.Text;

namespace IntroProgAssignment
{
class Program

{

static void Main()
{
Console.WriteLine(" You are welcome, these are the lists of menu:";
string[] menuLists = new string[4] { "List All Files", " List Filtered Files", "Display Statistics", "Quit"};
for (int ind = 0; ind < menuLists.Length; ind++)
{
Console.WriteLine(" {0}. {1}", ind + 1, menuLists[ind]);
}
Console.WriteLine();

Console.Write(" Enter the number you are accessing:";
string userEntry = Console.ReadLine();
int userInput;
bool isUserInput = int.TryParse(userEntry, out userInput);

switch (userInput)
{
case 1:
FullFileListing();
QuitProgram();
Main();
break;

case 2:
FilteredFileListing();
QuitProgram();
Main();
break;

case 3:
FolderStatistics();
QuitProgram();
Main();
break;

case 4:
QuitProgram();
Main(); // calling main function
break;
default:
{
while (isUserInput == false)
{
Console.WriteLine(" Sorry you need to enter from number 1 to 4";
userEntry = Console.ReadLine();
isUserInput = int.TryParse(userEntry, out userInput);

}


}
break;


}




Console.ReadLine();


}


static void FullFileListing()
{


DirectoryInfo folderInfo = new DirectoryInfo("C:\\Windows";
FileInfo[] files = folderInfo.GetFiles();

for (int index = 0; index < files.Length; index++)
{
Console.WriteLine("{0}. {1} ({2})", index + 1, files[index].Name, files[index].Length);

}

Console.WriteLine();



}

static void FilteredFileListing()
{
DirectoryInfo folderInfo = new DirectoryInfo("C:\\Windows";

Console.WriteLine(" Below are 'exe' files:";
FileInfo[] exeFiles = folderInfo.GetFiles( "*.exe";
for (int i = 0; i < exeFiles.Length; i++)
{
Console.WriteLine( "{0}. {1} ({2})", i + 1, exeFiles[i].Name, exeFiles[i].Length);
}

Console.WriteLine(" Below are 'dll' files:";
FileInfo[] dllFiles = folderInfo.GetFiles("*.dll";
for (int i = 0; i < dllFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, dllFiles[i].Name, dllFiles[i].Length);
}
Console.WriteLine(" Below are 'log' files:";
FileInfo[] logFiles = folderInfo.GetFiles("*.log";
for (int i = 0; i < logFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, logFiles[i].Name, logFiles[i].Length);
}
Console.WriteLine(" Below are 'ini' files:";
FileInfo[] iniFiles = folderInfo.GetFiles("*.ini";
for (int i = 0; i < iniFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, iniFiles[i].Name, iniFiles[i].Length);
}
Console.WriteLine(" Below are 'xml' files:";
FileInfo[] xmlFiles = folderInfo.GetFiles("*.xml";
for (int i = 0; i < xmlFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, xmlFiles[i].Name, xmlFiles[i].Length);
}
Console.WriteLine(" Below are 'prx' files:";
FileInfo[] prxFiles = folderInfo.GetFiles("*.prx";
for (int i = 0; i < prxFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, prxFiles[i].Name, prxFiles[i].Length);
}
Console.WriteLine(" Below are 'manifest' files:";
FileInfo[] manifestFiles = folderInfo.GetFiles("*.manifest";
for (int i = 0; i < manifestFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, manifestFiles[i].Name, manifestFiles[i].Length);
}
Console.WriteLine(" Below are 'bin' files:";
FileInfo[] binFiles = folderInfo.GetFiles("*.bin";
for (int i = 0; i < binFiles.Length; i++)
{
Console.WriteLine("{0}. {1} ({2})", i + 1, binFiles[i].Name, binFiles[i].Length);
}

Console.ReadLine();
}


static void FolderStatistics()
{
DirectoryInfo statisticsInfo= new DirectoryInfo(" C:\\Windows";
FileInfo[] files = statisticsInfo.GetFiles();
Console.WriteLine(" Total files is {0}", files.Length);
Console.ReadLine();



}

static void QuitProgram()
{
Console.WriteLine("Press Y to exit";
string userAnswer = Console.ReadLine().ToUpper();
Console.Clear();

}





}
}





Any better suggestion?

Any contribution, pls?

@OP:
Must it be a guru?

DigitalSignal: @OP:
Must it be a guru?

I sorted it out myself. Thanks for your contribution though.