Cadenas De Texto

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ArchivosTexto
{
class Textos
{public string Larga(string[] palabras)
{
string palabra = "";
for (int x = 0; x < palabras.Length; x++)
{
if (x == 0)
{palabra = palabras[x];
}
else
{
if (palabras[x].Length > palabra.Length)
{palabra = palabras[x];
}
}
}
return palabra;
}

public string Vocales(string[] palabras)
{int vac = 0, van = 0;
string palabra="";
for(int x = 0; x < palabras.Length; x++){
for (int y = 0; y < palabras[x].Length; y++)
{if (palabras[x].Substring(y, 1) == "a" ^ palabras[x].Substring(y, 1) == "A" ^ palabras[x].Substring(y, 1) == "e" ^ palabras[x].Substring(y, 1) == "E" ^ palabras[x].Substring(y, 1) == "i" ^palabras[x].Substring(y, 1) == "I" ^ palabras[x].Substring(y, 1) == "o" ^ palabras[x].Substring(y, 1) == "O" ^ palabras[x].Substring(y, 1) == "u" ^ palabras[x].Substring(y, 1) == "U")
{vac++;
}
}
if (vac > van)
{
palabra = palabras[x];
van = vac;

}vac = 0;
}

return palabra;
}

public string Reversa(string palabra)
{
string rev = "";
for (int x =palabra.Length - 1; x >= 0; x--)
{
rev += palabra.Substring(x, 1) ;
}
return rev;
}

public int Vocales(string[] palabras, int h)...