<div>
This is a real mystery. It's not a privilege problem as SecurityException would be thrown.<br />
<br />
Do other sub-keys work?<br />
<br />
&nbsp; RegistryKey key = Registry.LocalMachine.Open<wbr />SubKey(@&quot;S<wbr />OFTWARE\Mi<wbr />crosoft&quot;);<wbr /><br />
<br />
Have you tried?<br />
<br />
&nbsp; RegistryKey key = Registry.LocalMachine.Open<wbr />SubKey(@&quot;S<wbr />OFTWARE&quot;);<wbr /><br />
&nbsp; RegistryKey key2 = key.OpenSubKey(@&quot;MyCompany<wbr />&quot;);<br />

</div>


This is a real mystery. It's not a privilege problem as SecurityException would be thrown.

Do other sub-keys work?

  RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft");

Have you tried?

  RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE");
  RegistryKey key2 = key.OpenSubKey(@"MyCompany");


<div>
Yes, I tried the SOFTWARE key only and it returned a result. Any sub folder created cannot be read.<br />
<br />
We have since decided that the machine has a problem and will re-install the OS.<br />
<br />
If you do not mind, I will ask that this question be deleted.
</div>


Yes, I tried the SOFTWARE key only and it returned a result. Any sub folder created cannot be read.

We have since decided that the machine has a problem and will re-install the OS.

If you do not mind, I will ask that this question be deleted.

<div>
We have re-installed the machine to 32bit. Your explaination sounds plausable. 
</div>


We have re-installed the machine to 32bit. Your explaination sounds plausable.

<div>
<div class="content wysiwyg-content">
hello,<br />
<br />
I am having a problem reading the registry. The following line returns NULL. <br />
RegistryKey key = Registry.LocalMachine.Open<wbr />SubKey(@&quot;S<wbr />OFTWARE\My<wbr />Company&quot;);<wbr /><br />
<br />
Windows XP 64 bit<br />
IIS running 32bit .NET framework and IIS enabled to run 32 bit apps.<br />
<br />
Key was created manually using regedit.<br />
<br />
I am administrator on this machine.<br />
<br />
Any ideas? thanks<br />
<br />
BTW, this works <br />
RegistryKey key = Registry.LocalMachine.Open<wbr />SubKey(@&quot;S<wbr />OFTWARE&quot;);<wbr />
</div>
</div>


hello,

I am having a problem reading the registry. The following line returns NULL. 
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\MyCompany");

Windows XP 64 bit
IIS running 32bit .NET framework and IIS enabled to run 32 bit apps.

Key was created manually using regedit.

I am administrator on this machine.

Any ideas? thanks

BTW, this works 
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE");

Returns NULL ... RegistryKey key = Registry.LocalMachine.OpenSubKey(@&quot;SOFTWARE\MyCompany&quot;);

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

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Returns NULL ... RegistryKey key = Registry.LocalMachine.OpenSubKey(@&quot;SOFTWARE\MyCompany&quot;);

Returns NULL ... RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\MyCompany");