VB.net中的myObject.MyField和myObject.MyField（）有什么区别？

Question

I stumbled upon this issue:

myObject 's class has a public field MyField which type is Decimal?

I accidentally access the field as if it were a property with this code:

myObject.MyField()

instead of

myObject.MyField

And I got the following error from the compiler: Structure 'Decimal?' cannot be indexed because it has no default property Structure 'Decimal?' cannot be indexed because it has no default property

Documentation on this error on MSND is very short and I just don't understand what it means.

Q: What's the meaning of myObject.MyField() if it has one, and why can't I use it on my field if so?

Note: my problem is now solved but I would like to understand...

Answer 1

You access elements of an array using () in VB.NET. The error message is telling you Structure 'Decimal?' cannot be indexed Structure 'Decimal?' cannot be indexed because it can't.

Answer 2

In that context it is the index operator, just like [] in C#.

To be more precise, in VB.NET it is called "default property" and in C# it is called "indexer".

See here for even more details.