Compare The Value Of Two/multi Column Array And Add Into Listbox Without Duplication In Visual Basic?

I've small project to do and now I'm stuck in middle. The program is to read the sequential text file and load it into a array/array of structure.The data information is like this (sample):

ID | Name | Type
1 | Cat | Animal
2 | Dog | Animal

[code]....

This is Just as sample data, my original data is more than this.I've open the DATA.txt file using FileStreamReader:

Dim FileStreamReader As StreamReader = New StreamREader(DATA.txt)

Read all the elements in the list and pass through ReadArrayString.Split the string using:

DataString.Split(New Char() {";"c})

Pass through

ReadArrayString(0)
ReadArrayString(1)
ReadArrayString(2)

Where index 0 is the ID, index 1 is the name, and index 2 is the Type Then I load the types in the dropdown combobox menu from the array with out duplication. Like this:

If TypeComboBox.FindString(ReadArrayString(2)) < 0 Then
TypeComboBox.Items.Add(ReadArrayString(2))
End If

Now When you click TypeComboBox it will show drop down menu with following list only.

Animal
Bird
Fish

After this, when Animal type is selected/clicked from combobox dropdown menu then it should only add the Id and Name of Animal type in the ListBox.Pseudocode may looks like this:

If Animal is selected/clicked from TypeComboBox then
Add Cat into listbox
Add Dog into listbox

[code]....

I've only figure out load items from only one column/array into combobox with out duplication.But can't figure out to compare the value of one column/array with another column/array and load it into listbox. I don't want to hardcode or write matching value inside the code. What I want is use the Array.