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Linq: List of lists to a long list
I have convert it using LINQ.List<List<string>> to List<string>.
If the leaves overlap one. Must be In one line.
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When you convert a list into a set, all the duplicates will be removed. The set can then be converted back into a list with list() . The drawback of this method is that the use of set() also changes the original list order, which is not restored after it is converted back into a list.
input.SelectMany(l => l).Distinct().ToList();
Your question is a bit under specified.
input.SelectMany(list=>list).ToList()
This puts all strings that are part of any list into the result list. If you need only unique elements add .Distinct between the SelectMany and the ToList
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