Question

I would like to read value in the registry using C#, if the values are not in the registry I create it. I have a reading problem:

 RegistryKey regKey1 = Registry.CurrentUser;
 regKey1 = regKey1.CreateSubKey(@"SOFTWARE\PNMDISPATCHER");

 if (regKey1 != null)
 {
  textBoxTaux1.Text = regKey1.GetValue("Taux1").ToString();
 }

I have the NullReferenceException when execute the GetValue function.
My values are in the registry, so why i get this error?

Answer 1

Looks like the RegistryKey.GetValue is returning null and cannot do .ToString()

Taken from MSDN for RegistryKey.GetValue:

Retrieves the value associated with the specified name. Returns null
if the name/value pair does not exist in the registry.