Merge pull request #346 from southernsun/patch-1

Update Sample08_Polymorphism.cs

Author: yfakariya

samples/Samples/Sample08_Polymorphism.cs

@@ -56,11 +56,7 @@ public void Polymorphism()
 			using ( var buffer = new MemoryStream() )
 			{
 				serializer.Pack(
-					buffer, new PolymorphicHolder
-					{
-						WithRuntimeType = new FileObject { Path = "/path/to/file" },
-						WithKnownType = new DirectoryObject { Path = "/path/to/dir/" }
-					}
+					buffer, rootObject	
 				);
 
 				buffer.Position = 0;
@@ -200,4 +196,4 @@ public static bool Verify( PolymorphicTypeVerificationContext context )
 			return true;
 		}
 	}
-}
+}