Senitel dongle protected Application, need to decode the strings inside application f

[resac]

Hi All.
below is the code where application generates Licence Key. anyone help me to generate key for this,

private void FormLic_Load(object sender, EventArgs e)
{
    string str = "";
    GClass0.smethod_4("1600000002C2F72CCB4998405A394209591F25A0DB235D533C6C4225E94EBF5A92D42E5B0A");
    string str3 = "";
    string salt = GClass0.smethod_4("5E0000000487759748EA30E819DA0B99542D8E87CF8904511F6015AE536164A9808F5460352E3B3938881EECAAFECCC45CEA990F439E9AB2F3A7B3BCA6E9C07EF325E63F971B0AF2A28EA8E154B2B044B38410D998F3EA1263631880900E1E5EBF19B9D837") + this.LabelSerialno.Text;
    string path = GClass0.smethod_4("2400000004B2B044B38410D998F3EA12636318809023297FB66EE2F024F7687DDB51727AEAFF948C969BFFC44A93D723F6580D9FC0");
    string str6 = "";
    if (File.Exists(path))
    {
        try
        {
            foreach (XElement element2 in XDocument.Load(path).Root.Elements())
            {
                if (element2.Name == GClass0.smethod_4("0E00000001A0CE016953F721EE02D9A031F6DEC3C9"))
                {
                    str3 = RijndaelManagedEncryption.RijndaelManagedEncryption.DecryptRijndael(element2.Value, salt);
                    this.TxtKey1.Text = str3;
                }
                if (element2.Name == GClass0.smethod_4("1200000002ADBBDABB30997F9924025036AB6AA05AB9D33BE83EFD023A25483DEFB74DBA46"))
                {
                    str = RijndaelManagedEncryption.RijndaelManagedEncryption.DecryptRijndael(element2.Value, salt);
                    this.TxtKey2.Text = str;
                }
                if (element2.Name == GClass0.smethod_4("0C00000003212FCFB92AFA64F83B99A10C996A3B97"))
                {
                    str6 = RijndaelManagedEncryption.RijndaelManagedEncryption.DecryptRijndael(element2.Value, salt);
                    this.TxtKey3.Text = str6;
                }
            }
        }
        catch
        {
        }
    }
}




private void BrowseLic_Click(object sender, EventArgs e)
{
    OpenFileDialog dialog = new OpenFileDialog {
        Filter = GClass0.smethod_4("1200000003AD868D3300D6DEFE1687278BE054E8650622D7BB4172348F1568AA05AA37F670"),
        Multiselect = (bool) GClass0.smethod_5("0184915E1EB04681446C44741AF4B20254")
    };
    if (dialog.ShowDialog() == GClass0.smethod_5("02C3B9EF619FE76CCE7647C51A0327F099"))
    {
        GClass0.smethod_4("16000000019371554DCD35DFA5E1AA6BE196C971DA84092DFB36B42581C41DAF172E2713CC");
        string salt = GClass0.smethod_4("5E0000000487759748EA30E819DA0B99542D8E87CF8904511F6015AE536164A9808F5460352E3B3938881EECAAFECCC45CEA990F439E9AB2F3A7B3BCA6E9C07EF325E63F971B0AF2A28EA8E154B2B044B38410D998F3EA1263631880902C1562F846568564") + this.LabelSerialno.Text;
        string fileName = dialog.FileName;
        if (File.Exists(fileName))
        {
            this.BtnActivateLic.Visible = (bool) GClass0.smethod_5("049922DCDA8D32E815D98F6E510F024D3B");
            try
            {
                foreach (XElement element2 in XDocument.Load(fileName).Root.Elements())
                {
                    if (element2.Name == GClass0.smethod_4("0E00000004ED637C6B2265C1176CEC3A8B030B36BE"))
                    {
                        RijndaelManagedEncryption.RijndaelManagedEncryption.DecryptRijndael(element2.Value, salt);
                        this.TxtKey1.Text = element2.Value;
                    }
                    if (element2.Name == GClass0.smethod_4("1200000004FD02EFD56C8BA6B69C0B5DB5E7C4DE3421F82D02F7590E50F43CD90953407B8D"))
                    {
                        RijndaelManagedEncryption.RijndaelManagedEncryption.DecryptRijndael(element2.Value, salt);
                        this.TxtKey2.Text = element2.Value;
                    }
                    if (element2.Name == GClass0.smethod_4("0C0000000441827ABB06ACDAAB98B301CDB58E487A"))
                    {
                        RijndaelManagedEncryption.RijndaelManagedEncryption.DecryptRijndael(element2.Value, salt);
                        this.TxtKey3.Text = element2.Value;
                    }
                }
            }
            catch
            {
                MessageBox.Show(GClass0.smethod_4("20000000014FA96E595CA7D6583B1CA8D328F0AE04C435218779591C121B55707D288F932A"), "License Error", (MessageBoxButtons) GClass0.smethod_5("014A6E88A3CF637EEF66586E8665EFC772"), (MessageBoxIcon) GClass0.smethod_5("01338B607D039B512EC847DD26795B4950"));
                Application.Exit();
            }
        }
    }
}

private void BtnActivateLic_Click(object sender, EventArgs e)
{
    XmlWriter writer = XmlWriter.Create(Application.StartupPath + GClass0.smethod_4("260000000246B0B48D91CD6F2B2F2C5AADED8DE2A374358EDA32BACB6EB0FCE9CD0142A7815327F6C183DC132A3BA19F5B5ECED7C4"));
    writer.WriteStartDocument();
    writer.WriteStartElement(GClass0.smethod_4("0E00000001C435218779591C122BDABE9D8BDBEB33"));
    writer.WriteElementString(GClass0.smethod_4("0E000000032D0B713F7419CF108BB812700A47E6B7"), this.TxtKey1.Text);
    writer.WriteElementString(GClass0.smethod_4("120000000306CD182D072A0306A90BF1F1C555ED36EDCD896B7C4932229E35BAEF8741E86C"), this.TxtKey2.Text);
    writer.WriteElementString(GClass0.smethod_4("0C000000013B853C5A55203833CEB031E1CE5E9017"), this.TxtKey3.Text);
    writer.WriteEndElement();
    writer.WriteEndDocument();
    writer.Flush();
    writer.Close();
}


private static string smethod_0() => 
    "28ADC496D3BCB045";



private static uint smethod_1(char char_0)
{
    if (('0' <= char_0) && (char_0 <= '9'))
    {
        return (uint) (char_0 - '0');
    }
    if (('A' <= char_0) && (char_0 <= 'F'))
    {
        return (uint) ((char_0 - 'A') + 10);
    }
    return 0;
}



public static string smethod_2()
{
    byte[] buffer = new byte[0x420];
    if (0 == GClass2.SDNPro_3(smethod_0(), buffer))
    {
        return Encoding.UTF8.GetString(buffer);
    }
    return null;
}



public static string smethod_3()
{
    StringBuilder builder = new StringBuilder(0x210);
    if (0 == GClass2.SDNPro_4(smethod_0(), builder))
    {
        return builder.ToString();
    }
    return null;
}



public static string smethod_4(string string_0)
{
    StringBuilder builder = new StringBuilder(string_0);
    uint num = GClass2.SDNPro_5(smethod_0(), builder);
    if (num != 0)
    {
        char[] chArray = new char[num / 4];
        for (int i = 0; i < (num / 4); i++)
        {
            chArray[i] = (char) (((smethod_1(builder[i * 4]) * 0x10) + smethod_1(builder[(i * 4) + 1])) + (((smethod_1(builder[(i * 4) + 2]) * 0x10) + smethod_1(builder[(i * 4) + 3])) * 0x100));
        }
        string str = new string(chArray);
        return string.Intern(str);
    }
    return string_0;
}

public static int smethod_5(string string_0)
{
    StringBuilder builder = new StringBuilder(string_0);
    return GClass2.SDNPro_6(smethod_0(), builder);
}

public static long smethod_6(string string_0)
{
    StringBuilder builder = new StringBuilder(string_0);
    ulong num = GClass2.SDNPro_7(smethod_0(), builder);
    uint num2 = ((((smethod_1(builder[0]) * 0x10) + smethod_1(builder[1])) + (((smethod_1(builder[2]) * 0x10) + smethod_1(builder[3])) * 0x100)) + ((((smethod_1(builder[4]) * 0x10) + smethod_1(builder[5])) * 0x100) * 0x100)) + (((((smethod_1(builder[6]) * 0x10) + smethod_1(builder[7])) * 0x100) * 0x100) * 0x100);
    num = ((((num * ((ulong) 0x100L)) * ((ulong) 0x100L)) * ((ulong) 0x100L)) * ((ulong) 0x100L)) + num2;
    return (long) num;
}

i just dumped the .Net exe to check methods. i have dongle emulator . need to generate License file


Thanks