// Type: long, selector function is called
public static int Test3f()
{
Data_long[] source = new Data_long[]{ new Data_long{name="Tim", num=10L},
new Data_long{name="John", num=Int32.MaxValue},
new Data_long{name="Bob", num=40L}
};
long expected = (long)Int32.MaxValue + 50;
var actual = source.Sum((e) => e.num);
return ((expected == actual) ? 0 : 1);
}
