diff --git a/Program.cs b/Program.cs
new file mode 100644
index 0000000..f1a0983
--- /dev/null
+++ b/Program.cs
@@ -0,0 +1,13 @@
+using System;
+
+namespace StringProcessingApp
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            StringView myView = new StringView();
+            myView.Run();
+        }
+    }
+}
diff --git a/StringService.cs b/StringService.cs
new file mode 100644
index 0000000..5f3d991
--- /dev/null
+++ b/StringService.cs
@@ -0,0 +1,59 @@
+using System;
+
+namespace StringProcessingApp
+{
+    public class StringService
+    {
+        private string originalText = "";
+        public string CurrentText = "";
+
+        public void SetText(string text)
+        {
+            originalText = text;
+            CurrentText = text;
+        }
+
+        public void ToUpper()
+        {
+            CurrentText = CurrentText.ToUpper();
+        }
+
+        public void ToLower()
+        {
+            CurrentText = CurrentText.ToLower();
+        }
+
+        public int GetLength()
+        {
+            return CurrentText.Length;
+        }
+
+        public bool ContainsWord(string word)
+        {
+            return CurrentText.Contains(word);
+        }
+
+        public void ReplaceWord(string oldWord, string newWord)
+        {
+            CurrentText = CurrentText.Replace(oldWord, newWord);
+        }
+
+        public void ExtractSubstring(int start, int len)
+        {
+            if (start >= 0 && (start + len) <= CurrentText.Length)
+            {
+                CurrentText = CurrentText.Substring(start, len);
+            }
+        }
+
+        public void TrimSpaces()
+        {
+            CurrentText = currentText.Trim();
+        }
+
+        public void Reset()
+        {
+            CurrentText = originalText;
+        }
+    }
+}
diff --git a/StringView.cs b/StringView.cs
new file mode 100644
index 0000000..b0c62bc
--- /dev/null
+++ b/StringView.cs
@@ -0,0 +1,111 @@
+using System;
+
+namespace StringProcessingApp
+{
+    public class StringView
+    {
+        private StringService service = new StringService();
+
+        public void Run()
+        {
+            bool running = true;
+
+            while (running)
+            {
+                DisplayMenu();
+                string choice = Console.ReadLine();
+
+                if (choice == "1")
+                {
+                    Console.Write("Enter your text: ");
+                    string input = Console.ReadLine();
+                    service.SetText(input);
+                }
+                else if (choice == "2")
+                {
+                    Console.WriteLine("Current Text: " + service.CurrentText);
+                }
+                else if (choice == "3")
+                {
+                    service.ToUpper();
+                    Console.WriteLine("Changed to UPPERCASE.");
+                }
+                else if (choice == "4")
+                {
+                    service.ToLower();
+                    Console.WriteLine("Changed to lowercase.");
+                }
+                else if (choice == "5")
+                {
+                    int len = service.GetLength();
+                    Console.WriteLine("Total characters: " + len);
+                }
+                else if (choice == "6")
+                {
+                    Console.Write("Enter word to search: ");
+                    string find = Console.ReadLine();
+                    if (service.ContainsWord(find)) {
+                        Console.WriteLine("Found it!");
+                    } else {
+                        Console.WriteLine("Not found.");
+                    }
+                }
+                else if (choice == "7")
+                {
+                    Console.Write("Old word: ");
+                    string oldW = Console.ReadLine();
+                    Console.Write("New word: ");
+                    string newW = Console.ReadLine();
+                    service.ReplaceWord(oldW, newW);
+                }
+                else if (choice == "8")
+                {
+                    Console.Write("Start index: ");
+                    int start = int.Parse(Console.ReadLine());
+                    Console.Write("Length: ");
+                    int len = int.Parse(Console.ReadLine());
+                    service.ExtractSubstring(start, len);
+                }
+                else if (choice == "9")
+                {
+                    service.TrimSpaces();
+                    Console.WriteLine("Spaces removed.");
+                }
+                else if (choice == "10")
+                {
+                    service.Reset();
+                    Console.WriteLine("Text reset to original.");
+                }
+                else if (choice == "11")
+                {
+                    running = false;
+                }
+                else
+                {
+                    Console.WriteLine("Invalid choice, try again.");
+                }
+
+                Console.WriteLine("\nPress enter to continue...");
+                Console.ReadLine();
+            }
+        }
+
+        private void DisplayMenu()
+        {
+            Console.Clear();
+            Console.WriteLine("--- STRING PROCESSOR ---");
+            Console.WriteLine("1.Enter Text");
+            Console.WriteLine("2. View Current text");
+            Console.WriteLine("3. Convert to UPPERCASE");
+            Console.WriteLine("4. Convert to lowercase");
+            Console.WriteLine("5. Count Character");
+            Console.WriteLine("6. Check if it Contain Word");
+            Console.WriteLine("7. Replace Word");
+            Console.WriteLine("8. Extract Substring");
+            Console.WriteLine("9. Trim Spaces");
+            Console.WriteLine("10. Reset Text");
+            Console.WriteLine("11. Exit");
+            Console.Write("Selection: ");
+        }
+    }
+}