1:  using Microsoft.Win32;

   2:  public static bool WriteDefaulConStr(string str)

   3:              {

   4:              try {

   5:                  RegistryKey rk = Registry.CurrentUser;

   6:                  RegistryKey sk1 = rk.CreateSubKey(@"Software\abc\efg\hij\");

   7:                  sk1.SetValue("abc", str);

   8:                  return true;

   9:                  }

  10:              catch (Exception e) {

  11:                  ErrorInRegWriting = e.Message + "\nERROR CODE RG000";

  12:                  return false;

  13:                  }

  14:              }

  15:   

  16:  public static string ReadDefaulConStr() 

  17:              {

  18:              RegistryKey rk = Registry.CurrentUser;

  19:              RegistryKey sk1 = rk.OpenSubKey(@"Software\abc\efg\hij\");

  20:   

  21:              if (sk1 == null) 

  22:                  {

  23:                  return "NULL_KEY";

  24:                  }

  25:              else 

  26:                 {

  27:                  try {

  28:                      return (string)sk1.GetValue("abc");

  29:                      }

  30:                  catch (Exception e) 

  31:                      {                   

  32:                      return "NULL_KEY:" + "\n" + e.Message;

  33:                      }

  34:                }

  35:        }