How to add multiple textboxes or information to a sequential

How to add multiple textboxes or information to a sequential file?
Private Sub addBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles addBtn.Click
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    Dim path As String = _
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        "C:\Users\KeraBaby\Desktop\Payroll\Payroll Project Form\Payroll Project Form\bin\Debug"
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    If My.Computer.FileSystem.FileExists("Employees.txt") Then
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        My.Computer.FileSystem.WriteAllText("Employees.txt", Me.empIDbox.Text, False)
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        My.Computer.FileSystem.WriteAllText("Employees.txt", Me.fnamebox.Text, False)
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        My.Computer.FileSystem.WriteAllText("Employees.txt", Me.lnamebox.Text, False)
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        My.Computer.FileSystem.WriteAllText("Employees.txt", Me.salbox.Text, False)
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    Else
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        MessageBox.Show("File does not exist", "error", MessageBoxButtons.OK, MessageBoxIcon.Information)
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    End If
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End Sub