How to fix that compiler error? CS0236

So there’s the error that I get:
error CS0236: A field initializer cannot reference the nonstatic field, method, or property `UnityEngine.Component.transform’

and there’s my code:

using UnityEngine;
using System.Collections;

public class Controle : MonoBehaviour {

Vector3 Transform = transform.position;

// Update is called once per frame
void Update () {
	float MoveHorizontal = Input.GetAxis ("Horizontal");

	Transform.x = Transform.x + MoveHorizontal;
}

}

I am really confused and don’t understand what do i’ve done wrong…
English isn’t my first language so maybye it’s something not hard to understand

transform.position is not a known value, so you can’t use it to initialise a variable Transform. You can assign that value in Start(), say. Also, you shouldn’t name variables with the same name as a class name. So tbis is better…

Vector3 myTransform;

void Start() {
  myTransform = transform.position;
}