Program.cs

using System;
using System.IO;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine("Please provide a file path as a command-line argument.");
                return;
            }

            string filePath = args[0];

            if (!File.Exists(filePath))
            {
                Console.WriteLine("The specified file does not exist.");
                return;
            }

            string fileName = Path.GetFileNameWithoutExtension(filePath);
            int counter = 0;

            try
            {
                using (var reader = new StreamReader(filePath))
                {
                    while (!reader.EndOfStream)
                    {
                        string line = reader.ReadLine();
                        if (line.Contains(fileName))
                        {
                            counter++;
                        }
                    }
                }

                Console.WriteLine($"Found {counter} occurrences of '{fileName}' in the file.");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"An error occurred while processing the file: {ex.Message}");
            }
        }
    }
}