Why is this an issue?
Disposing an object twice in the same method, either with the Using statement or by calling
Dispose directly, is confusing and error-prone. For example, another developer might try to use an already-disposed object, or there can
be runtime errors for specific paths in the code.
In addition, even if the documentation explicitly states that
calling the Dispose method multiple times should not throw an exception, some implementations still do it. Thus it is safer to not
dispose of an object twice when possible.
How to fix it
Code examples
Noncompliant code example
Dim foo As New Disposable()
foo.Dispose()
foo.Dispose() ' Noncompliant
Using bar As New Disposable() ' Noncompliant
bar.Dispose()
End Using
Compliant solution
Dim foo As New Disposable()
foo.Dispose()
Using bar As New Disposable() ' Compliant
End Using