Gets a Boolean value indicating whether the System.IO.IsolatedStorage.IsolatedStorageFileStream object was opened asynchronously or synchronously.
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Asynchronous System.IO.IsolatedStorage.IsolatedStorageFileStream objects cannot be created, unlike System.IO.FileStream. However, the IsolatedStorageFileStream.BeginWrite(Byte[], int, int, AsyncCallback, object), IsolatedStorageFileStream.BeginRead(Byte[], int, int, AsyncCallback, object), IsolatedStorageFileStream.EndWrite(IAsyncResult), and IsolatedStorageFileStream.EndRead(IAsyncResult) methods are supported on synchronous instances, with some performance penalties.