Random application name

public string RandomString(int size, bool lowerCase = false) 
{ 
  var builder = new StringBuilder(size); 
  char offset = lowerCase ? 'a' : 'A'; 
  const int lettersOffset = 26;
 
  for (var i = 0; i < size; i++) 
  { 
   var [USER=879368]@char[/USER] = (char)_random.Next(offset, offset + lettersOffset); 
   builder.Append([USER=879368]@char[/USER]); 
  } 
 
  return lowerCase ? builder.ToString().ToLower() : builder.ToString(); 
}

 public static string GenerateName(int len)
    {
        Random r = new Random();
        string[] consonants = { "b", "c", "d", "f", "g", "h", "j", "k", "l", "m", "l", "n", "p", "q", "r", "s", "sh", "zh", "t", "v", "w", "x" };
        string[] vowels = { "a", "e", "i", "o", "u", "ae", "y" };
        string Name = "";
        Name += consonants[r.Next(consonants.Length)].ToUpper();
        Name += vowels[r.Next(vowels.Length)];
        int b = 2; //b tells how many times a new letter has been added. It's 2 right now because the first two letters are already in the name.
        while (b < len)
        {
            Name += consonants[r.Next(consonants.Length)];
            b++;
            Name += vowels[r.Next(vowels.Length)];
            b++;
        }

        return Name;


     }