start triangle in textbox vb.net

Public Class Form1
    Dim i, j As Integer
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        For Me.i = 1 To 5
            For Me.j = 1 To i
                txtdisp.Text += " * "
            Next
            txtdisp.Text += vbNewLine
        Next
    End Sub
End Class

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