How to change a Vector3 list individual axis using for statement

Good evening, i have been using unity3d 2018.1 for quite a while, because of incompatibility issues with some addons i upgraded to 2018.3.
Now i using a list of vector3 and changing its individual axis with a for statement but im being displayed the following error:

Assets\3DPrinting\servoArmController.cs(28,5): error CS1612: Cannot modify the return value of ‘List.this[int]’ because it is not a variable

Here is the abbreviated code:

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

public class servoArmController : MonoBehaviour {
	
	public List<GameObject> servo;
	
	public List<Vector3> servosAdjust;

    // Start is called before the first frame update
    void Start() {
        
    }

    // Update is called once per frame
    void Update(){
		baselimitRotation();
		
    }
	
	void baselimitRotation(){
		for (int i = 0; i < servosAdjust.Count; i++){
            if (servosAdjust_.x > 360f || servosAdjust*.x < -360f){*_

_ servosAdjust*.x = 0f;
}
if (servosAdjust.y > 360 || servosAdjust.y < -360){
servosAdjust.y = 0f;
}
if (servosAdjust.z > 360 || servosAdjust.z < -360){
servosAdjust.z = 0f;
}
}
}*_

}

Setting the components of a vector3 directly only works in JS not in C#. For this to work you first need to make a temporary Vector3, set all the axis and then assign it back to the list. Something like this:

   void baselimitRotation(){
             for (int i = 0; i < servosAdjust.Count; i++){
    
                 Vector3 temp = servosAdjust*;*

if (servosAdjust_.x > 360f || servosAdjust*.x < -360f){
25. temp.x = 0f;
}
if (servosAdjust.y > 360 || servosAdjust.y < -360){
temp.y = 0f;
}
30. if (servosAdjust.z > 360 || servosAdjust.z < -360){
temp.z = 0f;
}*_

servosAdjust = temp;
}
}

This is because the list item is just a copy so changing it doesn’t do anything.