Making old methods Obsolete instead of commenting out functionality

[zainjer]

In a situation where we are told to change a certain functionality within a function
it would be a great practice to make the previous methods Obsolete by adding the 'Obsolete' attribute on them
and writing a new method

Instead of commenting out functionality within the old method and writing new functionality.

This will help keep track of all the previous functionalities. and keep them alive incase we are told to revert back to old functionality

eg:

[Obsolete("This method is obsolete, Please use TogglePanel(bool value)")]
public void ClosePanel() {
}

[Obsolete("This method is obsolete, Please use TogglePanel(bool value)")]
public void OpenPanel(){
}

//New method
public void TogglePanel(bool value){
}

[MuhammadFaizanKhan]

This is a good recommendation currently I suggested to make backup of the method with _Backup string.

Prefix temporary objects with a double underscore and add Backup string after it __Player_Backup. Like __MainScene_Backup or Gameobject Backup __CameraController_Backup or a method backup __ActiveCamera_Backup