Converting Javascript to C#

I found a pinball tutorial that is written in javascript that I'm trying to translate to C#. I've gotten most of it translated but ran into some issues converting the hingeJoint.limit.min and max to what the script requests. My script instead sends the object flying all over the screen like a sparrow on crack cocaine.

Here is the Javascript version " #pragma strict

 //Parameters
 var restPosition : float = 0F;
 var pressedPosition : float = 45F;
 var flipperStrength : float = 10F;
 var flipperDamper : float = 1F;
 var inputButtonName : String = "LeftPaddle";
 
 function Awake ()
 {
     hingeJoint.useSpring = true;
 }
 
 // Update is called once per frame
 function Update ()
 {
     var spring : JointSpring = new JointSpring();
     
     spring.spring = flipperStrength;
     spring.damper = flipperDamper;
     
     if (Input.GetButton(inputButtonName))
         spring.targetPosition = pressedPosition;
     else
         spring.targetPosition = restPosition;
     
     hingeJoint.spring = spring;
     hingeJoint.useLimits = true;
     hingeJoint.limits.min = restPosition;
     hingeJoint.limits.max = pressedPosition;
 }

////////////////////////////////////////////////////////////////////////////////////////////

And here is what I've managed to translate:

 using UnityEngine;
 using System.Collections;
 
 public class PaddleController : MonoBehaviour {
     public float restPosition = 0f;
     public float pressedPosition = 45F;
     public float flipperStrength = 10f;
     public float flipperDamper = 1f;
     public string inputButtonName = "LeftPaddle";
     private JointLimits limits;
     
     void Start () 
     {
         hingeJoint.useSpring = true;
         limits = hingeJoint.limits; 
     }
     
     void Update () 
     {
         
         var spring = new JointSpring();
         spring.spring = flipperStrength;
         spring.damper = flipperDamper;
     if (Input.GetButton(inputButtonName)) spring.targetPosition = pressedPosition;
     else spring.targetPosition = spring.spring;
      
     hingeJoint.spring = spring;
     hingeJoint.useLimits = true;
     limits.min = restPosition;
     limits.max = pressedPosition;
     hingeJoint.limits = limits;
    
     }
 }

Can anyone help me figure out how to properly translate this?

Thanks