diff --git a/Assets/Scripts/Const/Const.Path.cs b/Assets/Scripts/Const/Const.Path.cs
index 184795db..ee381cb4 100644
--- a/Assets/Scripts/Const/Const.Path.cs
+++ b/Assets/Scripts/Const/Const.Path.cs
@@ -13,28 +13,28 @@ public partial class Const
 
         public static string GetLevelIconBig(int pLevelID)
         {
-            return string.Format("Image/LevelIcon_Big/{0}", (pLevelID + 1).ToString().PadLeft(3, '0'));
+            return string.Format("Image/LevelIcon_Big/{0}", (pLevelID + 1).ToString("D3"));
         }
 
         public static string GetLevelIconSmall(int pLevelID)
         {
-            return string.Format("Image/LevelIcon_Small/{0}", (pLevelID + 1).ToString().PadLeft(3, '0'));
+            return string.Format("Image/LevelIcon_Small/{0}", (pLevelID + 1).ToString("D3"));
         }
 
         public static string GetLevelLogo(int pLevelID)
         {
-            return string.Format("Image/LevelLogo/{0}", (pLevelID + 1).ToString().PadLeft(3, '0'));
+            return string.Format("Image/LevelLogo/{0}", (pLevelID + 1).ToString("D3"));
         }
 
         public static string GetSoundPic(int pLevelID, int pSoundIndex)
         {
-            string tLevelIDStr = (pLevelID + 1).ToString().PadLeft(3, '0');
+            string tLevelIDStr = (pLevelID + 1).ToString("D3");
             return string.Format("Image/SoundPic/{0}/{1}", tLevelIDStr, tLevelIDStr + "_" + (pSoundIndex + 1).ToString());
         }
 
         public static string GetSound(int pLevelID, int pSoundIndex)
         {
-            string tLevelIDStr = (pLevelID + 1).ToString().PadLeft(3, '0');
+            string tLevelIDStr = (pLevelID + 1).ToString("D3");
             return string.Format("Audio/GameSound/{0}/{1}", tLevelIDStr, tLevelIDStr + "_" + (pSoundIndex + 1).ToString());
         }
 
diff --git a/Assets/Scripts/UI/CustomControl/ImageNum.cs b/Assets/Scripts/UI/CustomControl/ImageNum.cs
index c2329dc9..a9ba3251 100644
--- a/Assets/Scripts/UI/CustomControl/ImageNum.cs
+++ b/Assets/Scripts/UI/CustomControl/ImageNum.cs
@@ -12,7 +12,7 @@ public class ImageNum : MonoBehaviour
     public void SetNum(int pNum)
     {
         pNum = pNum % 1000;
-        string tNumStr = pNum.ToString().PadLeft(3, '0');
+        string tNumStr = pNum.ToString("D3");
 
         mImgHundreds.sprite = ResourceManager.Instance.LoadRes<Sprite>(Const.Path.GetNumPicA(tNumStr[0].ToString()));
         mImgTens.sprite = ResourceManager.Instance.LoadRes<Sprite>(Const.Path.GetNumPicA(tNumStr[1].ToString()));