Address an int[] array from a class through a different class and is also constructed from a string?

The important bit is the construction of the reference using a string. ie, I need to get access to that int[] from the construction of a string.

For example using "myClass ["int"+myString]" to access myClass.intArray

What am I doing wrong? How can I do this?

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

 public class MyClass : MonoBehaviour {

 public int[] intArray = new int[3]{1,2,3};
 }

 //---------------------------------------------------------------------------

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

 public class MyOtherClass : MonoBehaviour {
     MyClass myClass;

     void theMethod(string myString){
          myClass = GetComponent<MyClass> ();

//-->Error is here://

          int[] theArray = myClass.GetType ().GetFields (myClass ["int"+myString]);

//--//

          theArray[0] = 4;
     }

     void Awake(){ theMethod("Array"); }
 }