class Program public static bool findInText int SearchValue string fil

class Program
    {
        public static bool findInText(int SearchValue, string filePath)
        {            
                using (StreamReader r = new StreamReader(filePath))
                {
                    string line;
                    while ((line = r.ReadLine()) != null)
                    {
                        int x = Int32.Parse(line);
                        if (x == SearchValue) return true;
                    }
                    return false;
                }        
       }

        static void Main(string[] args)
        {
            string File = "C:\\test.txt";
            Console.WriteLine(findInText(18, File));
        }
    }