The type 'Microsoft.SharePoint.SPUserCollection' has no constructors defined

Question

I need to get users within SPFieldUserValueCollection and set them inside SPUserCollection, but I have the following build error:

The type 'Microsoft.SharePoint.SPUserCollection' has no constructors defined

 SPFieldUserValueCollection employees = item["employees"] as SPFieldUserValueCollection;
            SPUserCollection users = new SPUserCollection();

            if (values != null)
            {
                foreach (SPFieldUserValue userValue in employees)
                {
                    users.Add(userValue.User.LoginName, userValue.User.Email, userValue.User.Name, userValue.User.Notes);
                }

                return users;
            }

How I can initialize SPUserCollection?

Answer 1

Use instead:

List<SPUser> users = new List<SPUser>(); 
//SPUser user = web.EnsureUser(userValue.User.LoginName);
users.add(user);

So... your code:

SPWeb web = SPContext.Current.Web;
SPFieldUserValueCollection employees = item["employees"] as SPFieldUserValueCollection;
List<SPUser> users = new List<SPUser>();

if (values != null)
{
    foreach (SPFieldUserValue userValue in employees)
    {
        SPUser user = web.EnsureUser(userValue.User.LoginName);
        users.Add(user);
    }

    return users;
}