Checks for reentrant attempts to change this collection.
Assembly: System (in System.dll)
If there was a call to BlockReentrancy of which the IDisposable return value has not yet been disposed of. Typically, this means when there are additional attempts to change this collection during a CollectionChanged event. However, it depends on when derived classes choose to call BlockReentrancy.
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)