ReSharper: Possible NullReferenceException with Enumerator?
ReSharper notifies me about a possible System.NullReferenceException
for the following code:
IEnumerator<IEdgeData> edgeEnumerator = edgeData.GetEnumerator();
while (edgeEnumerator.MoveNext())
{
ConvId fromConvId = edgeEnumerator.Current.From;
...
}
Specifically, it underlines:
edgeEnumerator.Current
I cannot figure out under which circumstanc开发者_开发百科es the exception could occur. My understanding is that the while
-loops inner statements will only be executed if MoveNext()
can set the enumerator on the next element.
The next element could actually be null. For example, the following code:
new List<SampleClass> { null, null, null }
will still give you an enumerator for each element, but the element itself is null.
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