Add project files.

RHLauncher.Helper/ServiceFileHandler.cs

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+using System.Security.Cryptography;
+
+namespace RHLauncher.RHLauncher.Helper
+{
+    public class ServiceFileHandler
+    {
+        private readonly string _iniFilePath;
+        private readonly string _installDirectory;
+
+        public ServiceFileHandler(string iniFileName, string installDirectory)
+        {
+            _iniFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, iniFileName);
+            _installDirectory = installDirectory;
+        }
+
+        public void UpdateService()
+        {
+            string service = new IniFile(_iniFilePath).ReadValue("Info", "Service");
+            string md5 = CalculateMD5(service);
+
+            string serviceDatPath = Path.Combine(_installDirectory, "Service.dat");
+            string[] lines = File.ReadAllLines(serviceDatPath);
+
+            string currentMd5 = lines[0];
+            string currentService = string.Join(Environment.NewLine, lines, 1, lines.Length - 1);
+
+            if (currentMd5 != md5)
+            {
+                lines[0] = md5;
+                File.WriteAllLines(serviceDatPath, lines);
+            }
+        }
+
+        private static string CalculateMD5(string input)
+        {
+            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
+            byte[] hashBytes = MD5.HashData(inputBytes);
+            return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
+        }
+    }
+}