Using List<string>.Any() to find if a string contains an item as well as find the matching item?

Question

I have a list of strings, which can be considered 'filters'.

For example:

List<string> filters = new List<string>();
filters.Add("Apple");
filters.Add("Orange");
filters.Add("Banana");

I have another list of strings, which contains sentences.

Example:

List<string> msgList = new List<string>();
msgList.Add("This sentence contains the word Apple.");
msgList.Add("This doesn't contain any fruits.");
msgList.Add("This does. It's a banana.");

Now I want to find out which items in msgList contains a fruit. For which, I use the following code:

foreach(string msg in msgList)
{
    if(filters.Any(msg.Contains))
    {
        // Do something.
    }
}

I'm wondering, is there a way in Linq where I can use something similar to List.Any() where I can check if msgList contains a fruit, and if it does, also get the fruit which matched the inquiry. If I can get the matching index in 'filters' that should be fine. That is, for the first iteration of the loop it should return 0 (index of 'Apple'), for the second iteration return null or something like a negative value, for the third iteration it should return 2 (index of 'Banana').

I checked around in SO as well as Google but couldn't find exactly what I'm looking for.

Answer 1

You want FirstOrDefault instead of Any.

FirstOrDefault will return the first object that matches, if found, or the default value (usually null) if not found.