An object that can be used to synchronize this collection to make it thread-safe. When implementing this, if your object uses a base object, like an IDictionary, or anything that has a SyncRoot, return that object instead of "this".

public abstract Object SyncRoot { get; }

Public MustOverride ReadOnly Property SyncRoot As Object
	Get

public:
virtual property Object^ SyncRoot {
	Object^ get () abstract;
}