Convert.ChangeType(object, Type) uses the thread's current culture for conversion. It sounds like you want the invariant culture, so you should use Convert.ChangeType(object, Type, IFormatProvider): cell.Value =... more 11/21/2016 9:01:49 AM

You're trying to access an instance member within an auto-implemented property initializer. That's like trying to do so in a field initializer. Basically, you can't reference this even implicitly in initializers, not even within lambda... more 11/21/2016 8:28:03 AM

You're starting the asynchronous operation, but you're not waiting for it to finish - when you've printed asyn demo there's nothing else keeping a non-daemon thread alive, so the process terminates. Just wait for the... more 11/21/2016 8:13:40 AM

You're declaring directions within the Start method, so it's a local variable. You should declare it as a field - and I'd make it a static field, as you don't need a different dictionary for each instance. You can use a collection... more 11/19/2016 9:23:04 AM

No, you can't do that - if you call new Foo(), that will always create an instance of Foo, never of a subclass. Instead, create a static factory method in Category: public static Category CreateCategory(string line) { if (line ==... more 11/18/2016 2:12:51 PM

ToArray always creates a copy. Your extension method does not behave the same way. Note that there are subtleties here around types as well. Consider this code: string[] x = { "a", "b" }; object[] y =... more 11/18/2016 9:27:55 AM

The attributes are lower-cased automatically. I found this out by putting self.log(attributes); into the script. So if you change your script to use propn instead of propN it works: project.setProperty(attributes.get("propn"),... more 11/17/2016 6:32:41 PM

Dictionary<,> itself doesn't provide a good way of doing this - because updating the value associated with a key counts as a change that invalidates any iterator. ConcurrentDictionary<,> does allow this though, and even has an... more 11/17/2016 3:10:57 PM

Well, you can use a using alias directive: #if __MonoCS__ using SQLiteConnection = Foo.Bar.SqliteConnection; #endif Then you can use SQLiteConnection everywhere within the same file. You may want to use the adapter pattern to put this... more 11/16/2016 4:10:23 PM

Well, it sounds like you want to: Filter by country Group by birth date Order the groups in descending order Take the first group So (assuming the property names have been fixed to follow conventions): var query = db.People ... more 11/16/2016 9:30:31 AM