Delete specific keys from registry with C#.

Check:
http://stackoverflow.com/questions/531151/how-to-delete-registry-value-in-c-sharp

string keyName = @"Your key path here"; 
using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyName, true)) 
{ 
    if (key == null) 
    { 
        // Key doesn't exist. Do whatever you want to handle 
        // this case 
    } 
    else 
    { 
        key.DeleteValue("MyApp"); 
    } 
} 

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I tried your way, but I cannot delete the keys.

Please take a look the attached picture.

Thanks!
Register.png

What is the error message and the path you use?

Also what OS? and
Is it 32 or 64 bit machine?
Note: Post your code and details of the error and/or exception message.

I am running on Windows Server 2003 Standard 32 Bit.

My Code:

string keyName = @"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon";
            using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyName, true))
            {
                if (key == null)
                {
                    // Key doesn't exist. Do whatever you want to handle 
                    // this case 
                }
                else
                {
                    key.DeleteValue("Registed");
                }
            } 

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The registry key is exist (attached file).

But when I run the command, it says key not exist.
Error.png
Register.png

Please try the following link...

http://www.codeproject.com/Questions/166232/C-delete-a-registry-key-cannot-get-it-done

http://social.msdn.microsoft.com/forums/en-US/Vsexpressvcs/thread/294ef1cc-1ac4-4f90-8590-d237e36b3d6b

http://geekswithblogs.net/BruceEitman/archive/2009/07/26/c--deleting-a-registry-key.aspx

Thanks.

are you running this code as Administrator or have read/write permissions to this key?
Check: http://superuser.com/questions/185434/why-cannot-administrators-delete-registry-keys-when-they-run-regedit-as-administ

Can you provide full registry path or confirm the path below?
Notice that I am using CurrentUser, thus the full path should be like:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Can you deleted the key manually?

Dear Mas,

I tried these codes but cannot:

 string keyName = @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon";
            using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyName, true))
            {
                if (key == null)
                {
                    MessageBox.Show("The key does not exist");
                }
                else
                {
                    key.DeleteValue("Registed");
                    key.DeleteValue("Logedon");
                }
            } 

Select allOpen in new window

I can delete them by hand.

I found my solution.