This tutorial is in C#, if you would like me to explain the code in Visual Basic then PM me
An array is a collection of variables, just think of it as a table, You declare and array and reference the different elements (each element holding another variable with an index, starting at 0. The first element is 0, the second element is 1 etc.
Here is how you declare arrays:

Declaring an array this way will not have a set amount of elements. You can declare it this way to set the number of elements:

The rule I explained at the beginning with the index starting at 0 doesn't apply to array declaration, so this array has 3 elements: 0, 1 and 2. Let me set some values to the array:

Here is a table to try and help you understand the array:

Now that we have some values in our array, lets print them out to show what we have got:

The code displays this when ran:

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This is only the basics or arrays, if you want to know more about them then leave a comment letting me know!
If you need any help with this tutorial then feel free to PM me