Need Decryption for this code

public string GetMD5(string text)
{
MD5CryptoServiceProvider MD5 = new MD5CryptoServiceProvider();
MD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(text));
byte[] result = MD5.Hash;
StringBuilder str = new StringBuilder();
for (int i = 1; i < result.Length; i++)
{
str.Append(result[i].ToString("x2"));
}
return str.ToString();
}