How to return and separate values from listbox?

Public Class Form1

'//Add button
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ListBox1.Items.Add("a=" & TextBox1.Text & " " & "b=" & TextBox2.Text & " " & "c=" & TextBox3.Text)
        TextBox1.Text = ""
        TextBox2.Text = ""
        TextBox3.Text = ""

    End Sub
'//Remove button
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ListBox1.Items.Remove(ListBox1.SelectedItem)
    End Sub

'//Edit button
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        TextBox1.Text = ListBox1.SelectedItem()'//There is a problem because it returns all values into one textbox and I just wanna to separate values just like in input
    End Sub