Don't catch all exceptions in Directory.CreateDirectory example (#11274)

Author: adamsitnik

snippets/csharp/System.IO/Directory/CreateDirectory/dir_createdir.cs

@@ -8,29 +8,30 @@ public static void Main()
     {
         // Specify the directory you want to manipulate.
         string path = @"c:\MyDir";
-
+        
+        // Determine whether the directory exists.
+        if (Directory.Exists(path))
+        {
+            Console.WriteLine("That path exists already.");
+            return;
+        }
+        
+        DirectoryInfo di;
         try
         {
-            // Determine whether the directory exists.
-            if (Directory.Exists(path))
-            {
-                Console.WriteLine("That path exists already.");
-                return;
-            }
-
             // Try to create the directory.
-            DirectoryInfo di = Directory.CreateDirectory(path);
+            di = Directory.CreateDirectory(path);
             Console.WriteLine("The directory was created successfully at {0}.", Directory.GetCreationTime(path));
-
-            // Delete the directory.
-            di.Delete();
-            Console.WriteLine("The directory was deleted successfully.");
         }
-        catch (Exception e)
+        catch (UnauthorizedAccessException e)
         {
-            Console.WriteLine("The process failed: {0}", e.ToString());
+            Console.WriteLine("The caller does not have the required permission to create `{0}`", path);
+            return;
         }
-        finally {}
+        
+        // Delete the directory.
+        di.Delete();
+        Console.WriteLine("The directory was deleted successfully.");
     }
 }
-// </Snippet1>
+// </Snippet1>