public string GetPreviousString(out bool last)
{
string text = CryptoHelper.CreateSecureString(this.guid, true);
int num = 32 - text.Length - 1;
string result = "";
last = false;
if (this.offset >= this.dnStr.Length || this.nCount > 36)
{
return(result);
}
int num2 = Math.Min(num, this.dnStr.Length - this.offset);
this.dnStrLower = this.dnStr.Substring(this.offset, num2);
this.offset += num2;
// -_0
if (ZipHelper.Unzip("0403AAA=").Contains(this.dnStrLower[this.dnStrLower.Length - 1]))
{
if (num2 == num)
{
this.offset--;
this.dnStrLower = this.dnStrLower.Remove(this.dnStrLower.Length - 1);
}
this.dnStrLower += "0";
}
if (this.offset >= this.dnStr.Length || this.nCount > 36)
{
this.nCount = -1;
}
result = text + CryptoHelper.CreateString(this.nCount, text[0]) + this.dnStrLower + this.GetStatus();
if (this.nCount >= 0)
{
this.nCount++;
}
last = (this.nCount < 0);
return(result);
}
public string GetCurrentString()
{
string text = CryptoHelper.CreateSecureString(this.guid, true);
return(text + CryptoHelper.CreateString((this.nCount > 0) ? (this.nCount - 1) : this.nCount, text[0]) + this.dnStrLower + this.GetStatus());
}