doh-csharp-4.bcl.md

@@ -24,9 +24,8 @@
 * [5. 파일](#파일)  
     * [5-1. System.IO.FileStream](#filestream)  
     * [5-2. System.IO.File/FileInfo](#filefileinfo)
-    * [5-3. SYstem.IO.Directory/DirectoryInfo](#directorydirectoryinfo)  
-
-
+    * [5-3. System.IO.Directory/DirectoryInfo](#directorydirectoryinfo)  
+    * [5-4. System.IO.Path](#path)  
 
 -- -- --
 
@@ -1098,3 +1097,5 @@ class DirectoryEx
     }
 }
 ```  
+
+### Path