C# - Initialize An Array Variable That Has Already Been Declared ?

In C#, I can declare an array variable like this: object[] Parameters;

And initialize it like this: Parameters = new object[20];

In VB, declaring and initializing an array is easy:

Dim Parameters(19) As Object
Dim Parameters As Object(19) ' Alternative Syntax

How would I initialize an array variable that has already been declared in VB.NET? Parameters = New Object(19) doesn't work.

For example, how would I translate the following to vb.net?

int value = 20;
object[] Parameters;
if (value > 10)
{
Parameters = new Object[20];
}