how to delete registry value in c#

I can get/set registry value using Microsoft.Win32.Registry class. For example

Registry.SetValue(@"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run", "MyApp", Application.ExecutablePath);

But i can't delete any value. How to delete registry value?

From stackoverflow

• RegistryKey.DeleteValue

  ebattulga : how to get RegistryKey object

  ebattulga : DeleteValue is not static method

• To delete the value set in your question:

  string keyName = @"Software\Microsoft\Windows\CurrentVersion\Run";
  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");
      }
  }
  

  Look at the docs for Registry.CurrentUser, RegistryKey.OpenSubKey and RegistryKey.DeleteValue for more info.

•     RegistryKey registrykeyHKLM = Registry.LocalMachine;
      string keyPath = @"Software\Microsoft\Windows\CurrentVersion\Run\MyApp";
      registrykeyHKLM.DeleteValue(keyPath);
      registrykeyHKLM.Close();
  

  Sergey Mirvoda : non working code

  Binoj Antony : Corrected the mistake, it should work now.

• To delete all subkeys/values in the tree (~recursively), here's an extension method that I use:

  public static void DeleteSubKeyTree(this RegistryKey key, string subkey, 
      bool throwOnMissingSubKey)
  {
      if (!throwOnMissingSubKey && key.OpenSubKey(subkey) == null) { return; }
      key.DeleteSubKeyTree(subkey);
  }
  

  Usage:

  string keyName = @"Software\Microsoft\Windows\CurrentVersion\Run";
  using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyName, true))
  {
     key.DeleteSubKeyTree("MyApp",false);   
  }