A method implementation contains code paths that could cause multiple calls to System.IDisposable.Dispose or a Dispose equivalent (such as a Close() method on some types) on the same object.
A correctly implemented Dispose method can be called multiple times without throwing an exception. However, this is not guaranteed and to avoid generating a System.ObjectDisposedException you should not call Dispose more than one time on an object.
To fix a violation of this rule, change the implementation so that regardless of the code path, Dispose is called only one time for the object.
Do not exclude a warning from this rule. Even if Dispose for the object is known to be safely callable multiple times, the implementation might change in the future.