In<T> extension method for checking if an item is within a collection

CollectionHelper.cs

using System;
using System.Linq;
using System.Collections.Generic;

public static class ExtensionMethods
{
    public static bool In<T>(this T item, IEqualityComparer<T> comparer, params T[] collection)
    {
        if (!collection.Any()) 
        { 
            return false;  
        }
        return collection.Contains(item, comparer);
    }

    public static bool In<T>(this T item, params T[] collection)
    {
        if (!collection.Any())
        { 
            return false;  
        }
        return collection.Contains(item);
    }
}