Question

I’m using EF, so my Child collections are of type EntityCollection < T >. If property “Children” is EntityCollection < T > How do I convert the query result IEnumerable < T > to EntityCollection < T >?

Thanks

 var list = element.Elements(ns + "Parent")
        .Select(parsedXml => 
                        Children = parsedXml.Elements(ns + "Child")
                        .Select(child => new Child { 
                                                        Id = Convert.ToInt32(child.Attribute("id").Value)
                                                   })
                        });

Answer 1

Since you are already using LINQ you can do this with the same model by creating an extension method:

public static EntityCollection<T> ToEntityCollection<T>(this IEnumerable<T> source) 
{
    var col = new EntityCollection<T>();
    foreach (var item in source)
    {
        col.Add(item);
    }
    return col;
}

Then use this in your original LINQ statement by adding .ToEntityCollection() to the end.