gistfile1.cs

class Program
{
    static void Main(string[] args)
    {
        var bunchOfValues = new List<Banana>
        {
            new Banana(),
            new Banana(),
            new Banana(),
            new Banana(),
            new Banana()
        };

        var filtered = bunchOfValues.Where(CheckSomething);
    }
    
    public class Banana
    {
    }

    public static bool CheckSomething(Banana value1, int value2)
    {
        return true;
    }
}