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C # Lambda Expression does not return expected result

I use the lamda expression to filter the request.

Basically, I have lines consisting of segments, and these segments are marked as deleted, inserted, or null.

What I want to return are segments marked as deleted, but whose sibling is NOT marked as deleted. As an example,

Line: "Soylent Green is people!" Broken into 2 segments... Segment 1: "Soylent Green " (marked as deleted) Segment 2: "is people!" (not marked as deleted)

Should return segment 1 to me. But the following example

 Line: "Open the pod bay doors Hal!" Broken into 3 segments... Segment 1: "Open the " (marked as deleted) Segment 2: "pod bay " (marked as deleted) Segment 3: "doors Hal!" (marked as deleted)

No need to return segments. See the following code:

 return seg => seg.ModType == Deleted && seg.Line.Segments.Any(segs => segs.ID != seg.ID && segs.ModType != Deleted);

Thanks, and I appreciate any help or suggestion as to why this is not working.

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3 answers

Since ModType is NULL, it does not return what I expected. The code should be ...

 return seg => seg.ModType == Deleted && seg.Line.Segments.Any(segs => segs.ID != seg.ID && (segs.ModType != Deleted || segs.ModType == null));

Thanks to everyone who responded and gave comments and suggestions!

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I would think it would be something like:

 return s => from segment in s.Line.Segments where segment.ModType == Deleted && segment.Line.Segments.Any(segs => segs.ModType != Deleted) select segment
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Instead of Any (), use Where (), which will return an IEnumerable object to you. As John says, Any () returns a boolean.

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