Best way to check for string in comma-delimited list with .NET?

Question

I\'m reading a comma-delimited list of strings from a config file. I need to check whether another string is in that list. For example:

\"apple,banana,cheese\"

Answer 1

Using linq:

listString.Split(',').Contains("apple")

W/o linq:

Array.IndexOf(listString.Split(','), "apple") >= 0