How to filter the collection values based on another collection in LINQ

If you want to select only the items that are common to both Lists you can do something along these lines.

var phones = new List<string>
            {
                "samsung",
                "apple",
                "Redmi",
                "Bar"
            };

var phones2 = new List<string>
            {
                "apple",
                "samsung",
                "Foo"
            };
//The Where extension takes a method that has a string as a parameter and returns a bool
var inclusiveList=   phones.Where(phones2.Contains).ToList();
Console.WriteLine(string.Join(',', inclusiveList));
//outputs: samsung,apple