Код:
public static string HashCode(string myDataEncoded)
{
try
{
SHA1 shA1 = SHA1.Create();
byte[] bytes = new ASCIIEncoding().GetBytes(myDataEncoded);
shA1.ComputeHash(bytes);
myDataEncoded = Convert.ToBase64String(shA1.Hash);
}
catch (Exception ex)
{
string str = "Error in HashCode : " + ex.Message;
}
return myDataEncoded;
}
На коленке.