Question

I’ve got WCF service which contains List with data from LibW.dll(my dll). In main program I also have got list from LibW.dll.

I return list from WCF service

[OperationContract]
public List<IWeather> Final()
{
    return returner;
}

and then try to set the result of method to value

cont = e.Result;

where

List<LibW.IWeather> cont=new List<LibW.IWeather>();

But I’ve got such error
Cannot implicitly convert type System.Collections.ObjectModel.ObservableCollection<object>' to 'System.Collections.Generic.List<NavigationGadget.IWeather>

What’s wrong?

Answer 1

Presumably e.Result is an ObservableCollection<T> then… even if you’ve declared it as a List<IWeather> in your service.

It looks like you also need to cast from object to IWeather – assuming each result really is an IWeather. You could always copy it to a list, like this:

cont = e.Result.Cast<IWeather>().ToList();

… or change your variable type so it can handle any IList<IWeather>.