Help with an error.

i’m not an expert video game developer and i’m working on some kind of 2D plateformer/shooter and i got this error

Assets/Scripts/PauseMenu.cs(5,14): error CS0101: The namespace global::' already contains a definition for PauseMenu’

any help?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PauseMenu : MonoBehaviour {
	public string levelSelect;
	public string mainMenu;

	public bool isPaused;
	public GameObject pauseMenuCanvas;

	// Use this for initialization
	void Start () {
	 
	}
	
	// Update is called once per frame
	void Update () {
		if (isPaused) {
			pauseMenuCanvas.SetActive (true);
			Time.timeScale = 0f;
		} else {
			pauseMenuCanvas.SetActive (false);
			Time.timeScale = 1f;
		}
		if (Input.GetKeyDown (KeyCode.Escape)) {
			PauseUnpause();
		}
	}
	public void PauseUnpause()
	{
	isPaused = !isPaused;
}
	public void Resume ()
	{
		isPaused = false;
	}
	public void Quit()
	{

		Application.LoadLevel (mainMenu);
	}
	public void LevelSelect ()
	{
		Application.LoadLevel (levelSelect);
	}

}

It means you have two classes named “PauseMenu” in project.