[.NET] Escribir en el registro en C#

Using System;
Using Microsoft.Win32;
   
  Public Class Seguridad {
      public Seguridad() 
      {
          try
          {
              RegistryKey reg1 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Phoning", true);
              reg1.GetValue("pwd");
          }
          catch
          {
              RegistryKey reg1 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE", true);
              reg1.CreateSubKey("Phoning");
              reg1 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Phoning", true);
              reg1.SetValue("pwd", "phoning");
             
          }
      }
   
      public bool verificarpass(string ingreso) 
      {
          string var1 = ingreso;
          RegistryKey reg1 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Phoning");
          string var2 = Convert.ToString(reg1.GetValue("pwd"));
          if (ingreso == var2)
          {
              return true;
          }
          else
          {
              return false;
          }
          
      }
  }