Sorry Me again :P Error CS0131

So i need more help with my health script I’m trying to add a game over
Player Health
using UnityEngine;
using System.Collections;

public class PlayerHealth : MonoBehaviour {
	// Use this for initialization
	int Health = 100;
    public void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	if (Health == 0)
		{
		Application.LoadLevel("GameOver");
		}
	}
	
	void OnGUI () {	
	}
	public void ChangeHealth(int howMuch){
	this.Health += howMuch;
	}
}

Enemy

using UnityEngine;
using System.Collections;

public class Enemy : MonoBehaviour {

	// Use this for initialization
    public void OnCollisionEnter(Collision collision)
    {     
		PlayerHealth playerHealth = GetComponent<PlayerHealth>();
		if (collision.gameObject.tag == "Player")
        {
		    if(playerHealth == null) return; // Get out.
			while(playerHealth.ChangeHealth = 100)
			{	
				playerHealth.ChangeHealth(-10);
			}
    }
	}
	// Update is called once per frame
	void Update () {
	 
	}
}

In my Enemy script I’ve added a while loop to Loop health damage each time i collide with Enemy object in player health game over condition If i ask a lot of questions here I’m sorry I’ve always learn from experience any help would be appreciated :).

Player Health

using UnityEngine; 
using System.Collections;

public class PlayerHealth : MonoBehaviour {
    int Health = 100;

    public void ChangeHealth(int howMuch){
        this.Health += howMuch;
        // Are we dead?
        this.CheckForDead();
    }

    //For everything you might want to do with PlayerHealth, you probably want to have 
    // an associated function (method)
    private void CheckForDead(){
         if(this.Health < 1) {
             Application.LoadLevel("GameOver");
         }
    }
}

Enemy

using UnityEngine;
using System.Collections;
 
public class Enemy : MonoBehaviour {
 
    // Use this for initialization
    public void OnCollisionEnter(Collision collision)
    {     
       PlayerHealth playerHealth = GetComponent<PlayerHealth>();
       if(playerHealth == null) return; // Get out.

       if (collision.gameObject.tag == "Player")
        {
          playerHealth.ChangeHealth(-10);
          // Logic like "Is the player dead?" doesn't go here. That's up to the PlayerHealth class to decide.
          // Also, your previous while loop would only loop once because it would only loop if the playerhealth was equal to 100 which makes no sense.
        }
    }

    //You don't need to keep around the default methods (like Update) if you aren't using them.
}