How to add Find function in IList

Question

I am returning an IList from the Business level. But in viewmodel I need to use the Find function. One way is to convert IList to List.

But somehow add the Find method to IList

Answer 1

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

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);
    }
}

Answer 2

Can I use the IndexOf method?

http://msdn.microsoft.com/en-us/library/3w0148af.aspx

Answer 3

Where

list.Where(predicate).First()

Answer 4

, just you need

var myModelasList= IListReturnedViewModel as List<ViewModelObject>;
//now you can use list feaures like Find Func.
myModelasList.Find((t => t.SomeFiald== currentState && t.IsSomting == somesymbol);