SoftUni Fundamentals - String manipulator group 1

using System;

namespace String___String_Manipulator___Group_1
{
    class Program
    {
        static void Main(string[] args)
        {
            string myString = Console.ReadLine();

            while (true)
            {
                string input = Console.ReadLine();

                if (input == "End")
                {
                    break;
                }

                string[] tokens = input.Split();
                string command = tokens[0];

                switch (command)
                {
                    case "Translate":
                        char currentChar = char.Parse(tokens[1]);
                        char replacement = char.Parse(tokens[2]);

                        myString = myString.Replace(currentChar, replacement);
                        Console.WriteLine(myString);
                        break;

                    case "Includes":
                        if (myString.Contains(tokens[1]))
                        {
                            Console.WriteLine("True");
                        }
                        else
                        {
                            Console.WriteLine("False");
                        }
                        break;

                    case "Start":
                        if (myString.StartsWith(tokens[1]))
                        {
                            Console.WriteLine("True");
                        }
                        else
                        {
                            Console.WriteLine("False");
                        }
                        break;

                    case "Lowercase":
                        myString = myString.ToLower();
                        Console.WriteLine(myString);
                        break;

                    case "FindIndex":
                        char character = char.Parse(tokens[1]);
                        Console.WriteLine(myString.LastIndexOf(character));
                        break;

                    case "Remove":
                        int startIndex = int.Parse(tokens[1]);
                        int length = int.Parse(tokens[2]);

                        myString = myString.Remove(startIndex, length);
                        Console.WriteLine(myString);
                        break;
                }
            }
        }
    }
}