AnalysisEngine.RegistryWatchers.currentUserEvent C# (CSharp) Method

        private void currentUserEvent(object sender, EventArrivedEventArgs e)
        {
            RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Run");
            foreach (string v in key.GetValueNames())
            {
                if (!currentUserReg.ContainsKey(v))
                {
                    string value = Convert.ToString(key.GetValue(v));

                    builder.Clear();
                    builder.Append("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\");
                    builder.Append(v);
                    builder.Append(" - ");
                    builder.Append(value);

                    string detect = "";
                    if (value.Contains(".vbs"))
                    {
                        detect = "User Persistence";
                    }
                    else
                    {
                        detect = "New Startup Item";
                    }

                    RegistryKeyObject evt = new RegistryKeyObject();
                    evt.Key = "HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run";
                    evt.KeyName = v;
                    evt.Detection = "Persistence";
                    evt.KeyType = "User Startup";
                    evt.Path = "HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\" + v;
                    addRegistry(this, evt);

                    string date = DateTime.Now.ToShortDateString() + " " + DateTime.Now.ToShortTimeString();
                    w.write(date, builder.ToString(), detect);

                    currentUserReg.Add(v, value);
                }
            }

            List<string> toremove = new List<string>();

            foreach (string val in currentUserReg.Keys)
            {
                if (!key.GetValueNames().Contains(val))
                {
                    toremove.Add(val);
                }
            }

            foreach (string val in toremove)
            {
                currentUserReg.Remove(val);
                removedEntry(this, val);
            }
        }