public static async Task <Copyable> DecodeFile(string[] paths, Window sender, Type ensure)
{
Copyable ret = new Copyable();
try {
foreach (string path in paths)
{
Copyable copyable;
using (FileStream file = File.Open(path, FileMode.Open, FileAccess.Read))
copyable = await Decoder.Decode(file, typeof(Copyable));
if (!ensure.IsAssignableFrom(copyable.Type))
{
throw new InvalidDataException();
}
ret.Merge(copyable);
}
return(ret);
} catch {
await MessageWindow.CreateReadError(sender);
return(null);
}
}