回答編集履歴
1
FirstOrDefaultに変更
test
CHANGED
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@@ -16,4 +16,4 @@
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16
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-
`var ret = parentDictionary.Where(e => e.Value[key].Equals(value)).First().Value;`
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19
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+
`var ret = parentDictionary.Where(e => e.Value[key].Equals(value)).FirstOrDefault().Value;`
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