computer SHA1 and MD5 hashes of strings

hashing methods

	//requires using System.Security.Cryptography;

    static string GetSHA1 (string ipString) {
        SHA1 sha1 = new SHA1CryptoServiceProvider ();
        byte[] ipBytes = Encoding.Default.GetBytes (ipString.ToCharArray ());
        byte[] opBytes = sha1.ComputeHash (ipBytes);
 
        StringBuilder stringBuilder = new StringBuilder (40);
        for (int i = 0; i < opBytes.Length; i++) {
            stringBuilder.Append (opBytes[i].ToString ("x2"));
        }
 
        return stringBuilder.ToString ();
    }
 
    static string GetMD5 (string ipString) {
        MD5 md5 = new MD5CryptoServiceProvider ();
        byte[] ipBytes = Encoding.Default.GetBytes (ipString.ToCharArray ());
        byte[] opBytes = md5.ComputeHash (ipBytes);
 
        StringBuilder stringBuilder = new StringBuilder (40);
        for (int i = 0; i < opBytes.Length; i++) {
            stringBuilder.Append (opBytes[i].ToString ("x2"));
        }
 
        return stringBuilder.ToString ();
    }