can someone help me solove this error ? please, wasted 35 mins

Hello hero, so I am beginner, and basically what i want to do is, Whenever I switch scenes while playing, I have this button Esc. as pauses the game and loads u to a screen where it has paused.... the problem is I can't stop the music already playing at the beginning of the start, where it keep on playing and when i press Esc. i get to the paused scene, but the old music is still playing with the other music which is really annoying, Here is the code below.

The errors i get are 2, first is error CS0019: Operator !=' cannot be applied to operands of type MusicPlayer' and string' second is error CS0428: Cannot convert method group DestroyObject' to non-delegate type `MusicPlayer'. Consider using parentheses to invoke the method

using UnityEngine; using System.Collections;

public class MusicPlayer : MonoBehaviour { static MusicPlayer instance = null;

 void Awake () {

 Debug.Log("Music player Awake" + GetInstanceID());
     if (instance != null) {
 Destroy (gameObject);
 print ("Duplicate Music player self-destructing!");
 }
  else if (instance != ("Level_01") || instance != ("Level_02")) {

   instance = DestroyObject;

     }
     else {
         instance = this;
         GameObject.DontDestroyOnLoad(gameObject);
 }
  

 }

}