Linq casting between types

Question

Is there a better way to pass this list of guide lines to the ends using linq:

public static IList<Guid> ToGuidList(this IList<string> guids)
    {
        IList<Guid> guidList = new List<Guid>();
        foreach(var item in guids)
        {
            guidList.Add(new Guid(item));
        }
        return guidList;
    }

I watched:

guids.Cast<Guid>().ToList()

but that doesn't seem like a trick.

Any advice appreciated.

Answer 1

guids.Select(x => new Guid(x)).ToList()

Answer 2

guids.Cast<Guid>().ToList()

Just trying to pass each list item to Guid. Since you cannot pass the string directly to Guid, this will not work.

However, it's easy to build a Guid from a string, you can do this for each item in the list using a selector:

var guidsAsGuid = guids.Select(x => new Guid(x)).ToList()

Answer 3

You can use .Select to implement the correct click:

var guids = from stringGuid in dataSource
            select new Guid(stringGuid)

or

IList<string> guidsAsString = ...
var guids  = guidsAsString.Select(g=>new Guid(g));