Program.cs

using System;
using System.Text;

namespace string_stuff
{
    class StringChallenge {
        // Using a Console.WriteLine, display the number of letters in the startingMessage.
        // Using a Console.WriteLine, display the position or index of the "#" in the startingMessage.
        // Create a new string that contains the phrase "harrypotter".
        // Insert a space between the word "harry" and the word "potter".
        // Capitalize the word "harry" so that it reads as "Harry".
        // Find out the number of the amount of letters in the string you've got so far.
        public static void Solution() {
            string startingMessage = "C# is actually two C++ in a trenchcoat!";
            Console.WriteLine(startingMessage.Length);
            int index = startingMessage.IndexOf("#");
            // 1 
            Console.WriteLine(index);
            string name = "harrypotter";
            name = name.Insert(5, " ");
            // 2
            Console.WriteLine(name);
            name = name[0].ToString().ToUpper() + name.Substring(1, name.Length - 1);
            // 3
            Console.WriteLine(name);
            string[] arr = name.Split(" ");
            string joinedWords = string.Join("", arr);
            // 4
            Console.WriteLine(joinedWords.Length);
            StringBuilder sb = new StringBuilder(name);
            index = name.IndexOf("p");
            char p = name[index].ToString().ToUpper()[0];
            sb[index] = p;
            name = sb.ToString();
            // 5
            Console.WriteLine(name);
        }
    }
    class EnumsChallenge {
        // Create a variable called "playerRank" which has the type of Ranks, and set it to Unranked.
        // Display the player's rank in a Console.WriteLine message - a nice & user-friendly one with some string interpolation.
        // Find out what the player's next rank will be. This should work no matter what rank the player currently has (eg. if the player starts as Gold rank instead of Unranked). This requires some tricks with integer-enum type conversion!
        // Use Console.WriteLine to display a user-friendly message about their next rank. Include both the rank and the number of the rank (eg. "Your next rank is Bronze, which is rank number 2!").
        public enum Ranks
        {
            Unranked,
            Bronze,
            Silver,
            Gold,
            Diamond,
            Platinum
        }
        public static void Solution() {
            Ranks playerRank = Ranks.Unranked;
            // 1
            Console.WriteLine(playerRank);
            // 2
            Console.WriteLine($"player one your rank is {playerRank}");
            int nextRankIndex = (int)playerRank + 1;
            Ranks nextRank = (Ranks)nextRankIndex;
            // 3
            Console.WriteLine(nextRank);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            // StringChallenge.Solution();
            EnumsChallenge.Solution();
        }
    }
}