CodeTV.WizardForm.buttonScanChannels_Click C# (CSharp) Method

        private void buttonScanChannels_Click(object sender, EventArgs e)
        {
            if (this.propertyGridChannel.SelectedObject != null && this.propertyGridChannel.SelectedObject is ChannelTV)
            {
                MainForm.ClearGraph();

                this.continueScanning = true;
                this.buttonScanChannels.Enabled = false;
                this.buttonScanStop.Enabled = true;

                ChannelTV templateChannelTV = this.propertyGridChannel.SelectedObject as ChannelTV;
                ChannelTV currentChannelTV;
                bool needRebuild = true;
                if (templateChannelTV is ChannelDVB)
                {
                    if (this.tabControlScanner.SelectedTab == this.tabPageScanPredefined)
                    {
                        List<string> region;
                        if (this.currentCountries.TryGetValue((string)this.comboBoxScanRegion.SelectedItem, out region))
                        {
                            foreach (string currentFrequency in region)
                            {
                                if (!continueScanning) break;

                                currentChannelTV = templateChannelTV.MakeCopy() as ChannelTV;
                                TransponderReader.PopulateChannelWithTransponderSettings(ref currentChannelTV, currentFrequency);
                                needRebuild = ScanProbeFrequency(currentChannelTV, needRebuild);
                            }
                        }
                    }
                    else if (this.tabControlScanner.SelectedTab == this.tabPageScanManual)
                    {
                        int startFrequency = int.Parse(this.textBoxScanStartFrequency.Text);
                        int stopFrequency = int.Parse(this.textBoxScanStopFrequency.Text);
                        int bandwidth = int.Parse(this.textBoxScanBandwidth.Text);
                        int currentFrequency = startFrequency;
                        while (currentFrequency <= stopFrequency && continueScanning)
                        {
                            currentChannelTV = templateChannelTV.MakeCopy() as ChannelTV;

                            (currentChannelTV as ChannelDVB).Frequency = currentFrequency;
                            currentFrequency += bandwidth;

                            needRebuild = ScanProbeFrequency(currentChannelTV, needRebuild);
                        }
                    }
                }
                else if (templateChannelTV is ChannelAnalogic)
                {
                    int startChannelNumber = 0; // int.Parse(this.textBoxScanStartFrequency.Text);
                    int stopChannelNumber = 100; // int.Parse(this.textBoxScanStopFrequency.Text);
                    int currentChannelNumber = startChannelNumber;
                    while (currentChannelNumber <= stopChannelNumber && continueScanning)
                    {
                        currentChannelTV = templateChannelTV.MakeCopy() as ChannelTV;

                        (currentChannelTV as ChannelAnalogic).Channel = currentChannelNumber;
                        currentChannelNumber++;

                        needRebuild = ScanProbeFrequency(currentChannelTV, needRebuild);
                    }
                }
                this.buttonScanChannels.Enabled = true;
                this.buttonScanStop.Enabled = false;
            }
            else
                MessageBox.Show(Properties.Resources.WizardYouMustCreateChannelTemplate);
        }