c# ilk çalışmayı algılama

if (Properties.Settings.Default.FirstUse)
 {
     Properties.Settings.Default.FirstUse = false;
     Properties.Settings.Default.Save();

     // do things first-time only
 }

------

  const string REGISTRY_KEY = @"HKEY_CURRENT_USER\MyApplication";
        const string REGISTY_VALUE = "FirstRun";
        if (Convert.ToInt32(Microsoft.Win32.Registry.GetValue(REGISTRY_KEY, REGISTY_VALUE, 0)) == 0)
        {
            lblGreetings.Text = "Welcome New User";
            //Change the value since the program has run once now
            Microsoft.Win32.Registry.SetValue(REGISTRY_KEY, REGISTY_VALUE, 1, Microsoft.Win32.RegistryValueKind.DWord);
        }
        else
        {
            lblGreetings.Text = "Welcome Back User";
        }