C# Convert IEnumerable to IList using .ToList()?

Question

I am using an external library thats returns a `IEnumerable`. After I have recieved them I would like to add some models to the end. That only seems possible when using an `IList` or some other collection. So when i'm trying to convert the `IEnumerable` to a list using the `.ToList()` method it returns an `IEnumerable`. That's not the what I expected? Am I using `.ToList()` correct? Or what else would solve my problem? This is my code i have so far: ``` IList languages = GetLanguages(dateDrom, dateTo).ToList(); IList primaryItems = languages.Take(10); ``` This last line produces an error saying: `Cannot implicitly convert type 'System.Collections.Generic.IEnumerable' to 'System.Collections.Generic.IList'. An explicit conversion exists (are you missing a cast?)` Thanks in advance!

Accepted Answer

The value of `languages` is a reference to a `List<>`, but then you're calling `Take(10)` on that, which doesn't return a list. Just move your `ToList()` call: ``` IEnumerable languages = GetLanguages(dateDrom, dateTo); IList primaryItems = languages.Take(10).ToList(); ``` Or just do it in one call: ``` var primaryItems = GetLanguages(dateDrom, dateTo).Take(10).ToList(); ``` Also, this isn't quite correct: After I have recieved them I would like to add some models to the end. An alternative is to use `Concat`. For example: ``` var items = GetLanguages(dateDrom, dateTo).Take(10).Concat(fixedItems); ```

C# Convert IEnumerable to IList using .ToList()?

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