I'm not sure where I'm going wrong with this. it's supposed to let the user add scores to the list, then calculate the total, average, and count. However, it doesn't let me add more values to the list. Any help whatsoever would be awesome!
Keep in mind, I am new to VB and programming languages, and was just playing around with code hoping for any sort of positive result, and therefore some of the code may not be necessary, or make sense.

Here's what I have now:

Private Sub addbutton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles addbutton.Click

Dim scoreList As New List(Of Integer)
Dim score As Integer


If TextBox1.Text >= 0 And TextBox1.Text <= 100 Then
scoreList.Add(CInt(TextBox1.Text))

Dim num As Integer
For Each num In scoreList
Console.WriteLine(num)
Next

Dim i As Integer
For i = 0 To scoreList.Count - 1
Console.WriteLine(scoreList.Item(i))
Next i

score = TextBox1.Text

Dim scoreTotal As Integer = scoreTotal + score
TextBox2.Text = scoreTotal

Dim scoreCount As Integer = scoreCount + 1
TextBox3.Text = scoreCount


Dim scoreAverage As Decimal = Math.Round(scoreTotal / scoreCount, 2)
TextBox4.Text = scoreAverage

End If
End Sub