Question

I am returning IList from Business layer. But in viewmodel I have to use Find function.
One method is to convert IList to List.

But is there anyway to add “Find” method to IList

Answer 1

Well, there are the Linq extension methods .Where (to fecth all that match) and .FirstOrDefault (to fetch the first match) or you can write your own extension method against IList like:

public static class IListExtensions
{
    public static T FindFirst<T>(this IList<T> source, Func<T, bool> condition)
    {
        foreach(T item in source)
            if(condition(item))
                return item;
        return default(T);
    }
}