update readme

README_COLLECTIONS.md

@@ -1,9 +1,9 @@
-# Livet.Collections
+## Livet.Collections
 
 Livet collections is a copy of StatefulModel.
 Original is using `StatefulModel` namespace, this package is using `Livet.Collections` namespace.
 
-## NotifyCollections
+### NotifyCollections
 
 the classes that implement `ISynchronizableNotifyChangedCollection<T>` have ToSyncedXXX Methods (XXX ... any `ISynchronizableNotifyChangedCollection<T>`).
 
@@ -12,7 +12,7 @@ ToSyncedXXX Methods is creating one-way synchronized collection with source coll
 ![image](./Images/collectionoverview.png)
 ![image](./Images/readonlywrapper.png)
 
-###Simple Usage
+#### Simple Usage
 ```csharp
 	//thread-safe collection
 	var source = new ObservableSynchronizedCollection<int>(Enumerable.Range(1,3));
@@ -24,10 +24,10 @@ ToSyncedXXX Methods is creating one-way synchronized collection with source coll
 	var dispatcherSource = new SynchronizationContextCollection<int>(Enumerable.Range(1,5),context);
 ```
 
-### Sync Collections
+#### Sync Collections
 While creating one-way synchronized collection, this method lock source collection, so no leak items.
 ![image](./Images/syncCollections.png)
 
-### Detach
+#### Detach
 `ISynchronizableNotifyChangedCollection<T>` is IDisposable. When Dispose() called , all EventHandler from source collection will be detached.
 ![image](./Images/detach.png)