checking whether key value exist or not using C#

Question

I have a key as

"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\{4CHJHSDJHSJHDJS-SDGSJAD}"

in my registry. using

Registry.GetValue("keyname", "valuename", "default value")

i can retrieve any value of it. But I need to check whether "{4CHJHSDJHSJHDJS-SDGSJAD}" exists in the registry or not. Can anybody suggest me what check I should use to do this?

Answer 1

With a registry key, you can try to get it with the OpenSubKey method. If the returned value is null, then the key does not exist. I'm talking about keys here, not values.

In your example, that would come down to:

var key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Uninstall\{4CHJHSDJHSJHDJS-SDGSJAD}");
if (key == null)
{
    // Key does not exist
}
else
{
    // Key exists
}

Answer 2

Have you tried this

          using Microsoft.Win32;
          RegistryKey myregistry = Registry.CurrentUser.OpenSubKey("MyKey");
          if (myregistry != null)
          {
           string Value=myregistry.GetValue("ID").ToString();
          }