Starting Index of Arrays in C# and VB.Net

Question

Have a look at the following code.,

C#

 string[] testString = new string[jobs.Count];

Equivalent VB.Net

Answer 1

In VB.NET the number in the array declaration means "max index", but in C# it means "number of elements"

Answer 2

In C# the array has the number of elements you provide:

string[] array = new string[2]; // will have two element [0] and [1]

In VB.NET the array has the number of elements you provide, plus one (you specify the max index value):

Dim array(2) As String // will have three elements (0), (1) and (2)

Answer 3

Because with your C# code sample,

string testString = new string[jobs.Count];

That's a constructor of creating an array of string.

While with the VB.Net example,

Dim testString As String = New String(jobs.Count - 1) {}

You are referring with a new String object with length of string declared in the parenthesis.

If you want to create an array of String in VB.Net it must be like this:

Dim testString (jobs.Count) As String

see supporting links below: VB.Net C#