Load data into 2-dimensional array

Public Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
Dim streamline As System.IO.StreamReader
Dim Txt As String = ""

OpenFileDialog1.FileName = "Select File"
If OpenFileDialog1.ShowDialog = Windows.Forms.DialogResult.Cancel Then
Return
End If
OpenFileName = OpenFileDialog1.FileName
streamline = New System.IO.StreamReader(OpenFileName)
Do Until streamline.EndOfStream
Txt = Txt & streamline.ReadLine & vbCrLf


Loop
streamline.Close()
TextBox1.Text = Txt
End Sub


So this code loads a bunch of numbers into a textbox......how do i load them into an array (two dimensional)

545435345 65
345345345 45

basically my goal is two have to input boxes, and when the user types in the left number, the second box displays the corresponding number...

any ideas?

vb Code:

Dim lines As String() = IO.File.ReadAllLines("file path here")
 
'Load the data into the TextBox.
myTextBox.Lines = lines
 
'Create a new 2D array to store the data.
Dim upperBound As Integer = lines.GetUpperBound(0)
Dim numbers(1, upperBound) As Integer
Dim lineParts As String()
Dim number As Integer
 
For rowIndex As Integer = 0 To upperBound Step 1
    lineParts = lines.Split(" "c)
 
    For columnIndex As Integer = 0 To 1
        If lineParts.Length > columnIndex AndAlso _
           Integer.TryParse(lineParts(columnIndex), number) Then
            numbers(columnIndex, rowIndex) = number
        End If
    Next columnIndex
Next rowIndex