Case structor in C# Unity

I am working on creating a levling system and I cant find anything on how case strucktures work in unity. I have worked in pure c# and created a case structor just not sure whats going on with it in Unity here. Here is my code so far then the error I am geting. If no one know a good solluction would any one plz recomend where I might find some help making a leveling system?

 using UnityEngine;
 using System.Collections;
 
 public class PlayerStatus : MonoBehaviour 
 {
 
     public int curExperience = 1;
     public int curLevel = 1;
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () 
     {
     
     switch(curLevel){
         case 0:
         if(curExperience <= 24){
          curLevel += 0;
          }
         case 1:
         if(curExperience >= 25){
          curLevel += 1;
          }
        break;
         case 2:
         if(curExperience >= 55){
          curLevel += 1;
          }
        break;
        case 3:
        if(curExperience >= 95){
          curLevel += 1;
          }    
        break;
        case 4:
         if(curExperience >= 130){
          curLevel += 1;
          }
        break;
        case 5:
         if(curExperience >= 182){
          curLevel += 1;
          }
        break;
        case 6:
         if(curExperience >= 254){
          curLevel += 1;
          }
        break;
        case 7:
         if(curExperience >= 356){
          curLevel += 1;
          }
        break;
        case 8:
         if(curExperience >= 500){
          curLevel += 1;
          }
        break;
        case 9:
         if(curExperience >= 700){
          curLevel += 1;
          }
        break;
        case 10:
         if(curExperience >= 990){
          curLevel += 1;
          }
        break;
     }
     
 
     }
 
 }

This is the error I am geting:

Assets/PlayerStatus.cs(18,9): error CS0163: Control cannot fall through from one case label to another.

If no one know a good solluction would any one plz recomend where I might find some help making a leveling system?