Cannot convert the specified Windows Runtime stream to a managed System.IO.Stream object without a buffer because this Windows ...

Cannot convert the specified Windows Runtime stream to a managed System.IO.Stream object without a buffer because this Windows Runtime stream has been previously converted to a managed Stream object with a buffer. Ensure that the 'bufferSize' argument matches the existing buffer or use the '{0}'-overload without the 'bufferSize' argument to convert the specified Windows Runtime stream to a Stream object with the same buffer size as previously.