Note the use of the comma operator in the C++ version. C# has no equivalent, hence the introduction of 'temp'. The first part is just adding to o.x, the bit aft

Note the use of the comma operator in the C++ version. C# has no equivalent, hence the introduction of 'temp'. The first part is just adding to o.x, the bit after the comma is the result of the expression, which is what is passed to min. The += part would not evaluate to a value. It's ugly.