Converting VB.Net Array to C#

Question

Here is a piece of VB.Net code:

Dim left As Object = NewLateBinding.LateGet(NewLateBinding.LateGet(sender, Nothing, "PressedLink", New Object(0 - 1) {}, Nothing, Nothing, Nothing), Nothing, "ItemName", New Object(0 - 1) {}, Nothing, Nothing, Nothing)

My question is with the:

New Object(0 - 1)

The online converter converted it to the following C# code:

New Object[0 - 1]

I did some research on the VB.Net array code and it look like the (0 - 1) is just telling which numbers the index starts and ends on. However, in C# the compiler sees this as a negative 1. I have a feeling that in C# it should be:

New Object[2]

I just wanted to see if anyone who is more familiar with VB.Net can verify this for me so I know I am doing it correctly or not.

Mark · Accepted Answer · 2014-11-12 22:35:39Z

4

In VB.NET, when declaring an array you specify the maximum index for each dimension, and these are zero based. So, New Object(0) {} is actually an array with one item. Because of this, to declare an array with no items, you use New Object(-1) {}. See here for more details.

In your VB.NET code, New Object(0 - 1) is the same as New Object(-1) - the 0 - 1 part is just zero minus one, or -1, meaning a zero-length array of Object.

The C# equivalent is just new Object[0], since in C# you specify the number of elements when declaring an array.

answered Nov 12, 2014 at 22:35

Mark

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2 Comments

Jared.Rodgers Over a year ago

Ok, I believe this is the answer I am looking for since there isn't anything in the curly brackets right after New Object(0 - 1). Thanks for the help!

Mark Over a year ago

I don't think that having nothing in the curly brackets is particularly relevant to it being a zero-length array. e.g. in VB.NET, New Object(4) {} would give you a 5 element array containing nulls, since no initial values are provided. The {} is just required in VB.NET, even when not initializing the array, while it's optional in C#. This also shows the possible reason for the style used by the original programmer - New Object(5 - 1) {} could be a reminder that VB.NET is a bit odd in how the array dimensions are declared, vs. New Object(4) {} - both are 5 element arrays!

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