Get if Registry entry exists if so do this, if not do that

Question

So in my registry I have the entry under "LocalMachine\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\" called "COMODO Internet Security" which is my firewall. Now what i'd like to know is how can i get the registry to check if that entry exists? If it does do this if not then do that. I know how to check if the subkey "Run" exists but not the entry for "COMODO Internet Security", this is the code I was using to get if the subkey exists.

                using (RegistryKey Key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"))
                if (Key != null)
                {

                    MessageBox.Show("found");
                }
                else
                {
                    MessageBox.Show("not found");
                }

Answer 1

If you're looking for a value under a subkey, (is that what you mean by "entry"?) you can use RegistryKey.GetValue(string). This will return the value if it exists, and null if it doesn't.

For example:

using (RegistryKey Key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"))
    if (Key != null)
    {    
        string val = Key.GetValue("COMODO Internet Security");
        if (val == null)
        {
            MessageBox.Show("value not found");
        }
        else
        {
            // use the value
        }
    }
    else
    {
        MessageBox.Show("key not found");
    }

Answer 2

Try this:

using (RegistryKey Key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run\COMODO Internet Security"))
{
  if (Key != null)
    MessageBox.Show("found");
  else
    MessageBox.Show("not found");
}