Forgive me, but I am but a complete newbie to .NET. Most of the syntax I can figure out on my own, but this one has me really puzzled: this.GetOrderDetail((int?)e.PrimaryKeyValue);

Why is int? in parens? Why is there a question mark after int? Am I confusing anybody else besides myself?

I'm going to go out on a limb here, but I'm guessing that e.PrimaryKeyvalue is being typed as int. Correct me if I'm wrong.

Jim