Script in c# that reads characters and Replace characters

Question

A Program in c# that reads a string string, and prints it on the console in such a way that the vowels are replaced,.

Answer 1

I didn’t quite understand what you wanted, but it would be something like this ?

string line = "testandoyyiiaaaccccbbb";

    //Busca o caractere que mais se repete.
    var maxRepeat = line.ToArray()
                  .GroupBy(x => x.ToString())
                  .ToDictionary(x => x.Key,
                                x => x.Count(), 
                                StringComparer.OrdinalIgnoreCase)
                  .OrderByDescending(x => x.Value)
                  .First();

    //Troca todas as vogais pelo caractere que mais se repete.
    var result = line.Replace("a", maxRepeat.Key)
                      .Replace("e", maxRepeat.Key)
                      .Replace("i", maxRepeat.Key)
                      .Replace("o", maxRepeat.Key)
                      .Replace("u", maxRepeat.Key);

    Console.WriteLine($"Caractere que mais se repete: {maxRepeat.Key}");
    Console.WriteLine(result);
    Console.ReadLine();