Gets an object that can be used to synchronize access to the ColumnDefinitionCollection.
Assembly: PresentationFramework (in PresentationFramework.dll)
Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads can still modify the collection, which causes the enumerator to throw an exception. To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions that result from changes made by other threads.